Unlearn Protocols

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The Grounding Protocol: How to Reconnect Your Body to the Earth Correctly

Kendall Toerner — Sat, 16 May 2026 02:56:35 GMT

Read the framework article here first:
https://unlearnhealth.com/content/grounding-and-health-why-the-body-needs-contact-with-the-earth

Grounding is simple, but most people get the details wrong.

They think it means standing outside. Or buying a grounding mat. Or touching any natural-looking surface. Or assuming indoor plug-in grounding is the same as direct contact with the Earth. It is not.

Grounding means direct conductive contact between your body and the electrical surface of the Earth.

That one sentence is the whole protocol.

Everything else is about making sure the contact is real, safe, consistent, and paired with the right environment.

The Core Principle

Your body is conductive.

Podcast Ep. 2 - Why Biology Can’t Be Studied Outside of Nature

Kendall Toerner — Fri, 15 May 2026 20:46:24 GMT

Episode 2 of the Unlearn Health Podcast™ explores why human biology cannot be fully understood when it is studied outside the environment that shaped it. Modern studies can be useful, but they often isolate variables, remove context, and examine cells or systems under artificial conditions that do not reflect living biology.

The episode makes the case for looking at health through first principles: sunlight, food, temperature, movement, water, stress, sleep, technology, and the natural patterns humans evolved with. Instead of waiting for perfect studies that may never be possible, we can use nature as the baseline and ask what signals the body is adapting to.

This is a foundational episode for understanding the Unlearn Health framework: disease is not random failure, but adaptation to environment.

Key ideas from the episode

Biology cannot be fully understood when it is removed from the environment that shaped it.
Modern studies can be useful, but they often isolate variables while missing the larger living context.
Nature is the original baseline for understanding human biology.
Disease is better understood as an adaptation to signals, not random failure.
The body responds to light, food, temperature, movement, sleep, stress, water, technology, and seasonal patterns.
Perfect proof is often impossible when studying complex living systems in artificial environments.
First principles help us understand health when conventional studies are too narrow or incomplete.
High-quality anecdotes can matter when they reveal patterns that controlled studies are not built to capture.

What this episode explores

Why biology must be studied in relationship to nature
The limits of lab-based and isolated-variable research
Why the evolved human environment matters
How environmental signals shape physiology
Why modern disease reflects mismatched inputs
The problem with waiting for perfect studies
Why first-principles thinking matters in health
How to use nature as the control group for human biology

What health advice have you always wondered might be wrong?

New here? Start with this guide.

You can explore more writing at unlearnhealth.com or join the discussion here on Protocols.

If you’re curious about the deeper environmental biology behind this — particularly how light and cellular energy interact — I explore the full framework in my book The Sunlight Cure.

Follow elsewhere:

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The Sun Adaptation Protocol

Kendall Toerner — Sat, 18 Apr 2026 01:14:57 GMT

New here? Start with this guide.

Sunlight isn’t the problem.

For most people, the real problem is slow repair.

When repair capacity is high, the body can:

absorb large amounts of sunlight
recover overnight
return to the sun the next day with little redness
gradually develop stronger tolerance

When repair capacity is low, even moderate exposure leads to:

persistent redness
peeling
fatigue
avoidance of sunlight

The goal of this protocol is not avoiding sunburn entirely.

The goal is building a physiology that absorbs sunlight and repairs it so efficiently that UV exposure becomes effortless.

That requires aligning several systems:

morning light signaling
mitochondrial repair capacity
DHEA signaling
dietary fat metabolism
skin hydration and chromophore function
elimination of oils that destabilize skin membranes

The Health Principle Almost Everyone Misses: Biology Is Non-Linear

Kendall Toerner — Tue, 14 Apr 2026 21:33:43 GMT

New here? Start with this guide.

Most people think the body works like a machine.

Put something in.
Get something out.

Eat fewer calories = lose weight.
Take a supplement = fix a deficiency.
Avoid a toxin = prevent disease.

This model feels intuitive.

But living systems rarely behave this way.

Biology is non-linear.

And once you understand that, many confusing health problems suddenly make more sense.

(If you want the full research breakdown, I wrote the long-form article here)

But the key idea is simple.

Small signals can sometimes produce very large biological effects.

And sometimes the signals that matter most are the ones we barely notice.

The Swing Analogy

Think about pushing a child on a swing.

You don’t need a strong push.

A tiny push works — if it arrives at the right moment.

Push at the wrong time and nothing happens.

Push at the right rhythm and the swing goes higher and higher.

The force wasn’t large.

But the timing matched the system.

This phenomenon is called resonance.

And biology is full of systems like this.

Cells, proteins, water networks, and electrical signaling all operate with natural rhythms.

When environmental signals align with those rhythms, the biological response can become amplified.

The Small Signal Problem

Modern health thinking focuses almost entirely on big inputs.

Large toxin exposures.

Severe nutrient deficiencies.

Extreme stress.

But living organisms evolved in environments filled with subtle signals.

Changes in light during sunrise.

Seasonal temperature shifts.

Daily movement patterns.

Magnetic fields of the Earth.

Tiny signals.

Yet organisms evolved systems designed to detect and amplify them.

That means the body is often far more sensitive to environmental information than we assume.

The Stage Your Biology Performs On

One helpful way to understand this is through a theater analogy.

Your DNA is the script.

But the performance depends on the stage.

Lighting. Temperature. Atmosphere. Acoustics.

Change the stage environment and the same script produces a completely different performance.

Biology works the same way.

Environmental signals shape the conditions under which cells operate.

Light exposure, temperature, movement, electromagnetic signals, magnetic fields, these factors change the stage your biology performs on.

The genes remain the same.

But the behavior of the system shifts.

Why Small Changes Sometimes Create Big Results

If biology behaved like a simple machine, health would be easy to understand. Small inputs would create small, predictable outputs.

But living systems don’t work that way.

Non-linear systems can appear stable for long periods before shifting suddenly. The change often looks abrupt, even though the underlying process has been unfolding quietly for a long time.

A simple analogy is leaning back in a chair.

At first nothing happens. You can tilt farther and farther and the chair still feels stable. Then, almost instantly, it tips.

The tipping moment wasn’t when the process started. It was simply the point where the system could no longer maintain balance.

Biological systems behave in much the same way. Small influences accumulate quietly until the system eventually crosses a threshold and moves into a different state.

The Delay Problem

Another reason this principle is difficult to recognize is time delay.

Many biological systems integrate signals slowly rather than responding immediately. The effects build gradually, often unfolding over months or years before anything noticeable appears.

Tooth decay is a good example. Eating sugar once does not create a cavity, but repeated exposure slowly shifts the environment of the mouth until enamel begins to break down. By the time a cavity appears, the process has usually been developing for a long time.

Weight gain works similarly. No one notices gaining two pounds over a few months, yet over several years those small increases accumulate into a major shift in metabolism and body composition.

When cause and effect are separated by long delays, the connection becomes much harder to recognize.

Invisible Forces Still Shape Biology

Another complication is that many environmental signals are not consciously detectable.

Gravity shapes bone density throughout life.

But you never feel gravity altering your skeleton.

Altitude slowly changes blood oxygen capacity.

But the adjustment unfolds over hours or days.

Cells operate at microscopic scales.

Electrical gradients, electron flow, and molecular vibrations shape biology in ways our senses cannot detect.

Just because something isn’t felt doesn’t mean it isn’t influencing the system.

Why This Changes How You Think About Health

Once you see biology as a non-linear system, many health mysteries become easier to understand.

Why small lifestyle changes sometimes produce dramatic improvements.

Why people can feel fine for years before symptoms appear.

Why subtle environmental shifts can reshape physiology.

Health isn’t just chemistry.

It’s physics.

It’s signals interacting with living systems that evolved to detect them.

And in non-linear systems, small signals can matter far more than expected.

A Question Worth Asking

If biology amplifies subtle signals…

Then the most powerful influences on health might not always be the obvious ones.

Sometimes the signals shaping the system are the ones we barely notice.

And sometimes the biggest changes in biology begin with the smallest signals.

If you’re curious about the deeper environmental biology behind this — particularly how light and cellular energy interact — I explore the full framework in my book The Sunlight Cure.

Follow elsewhere:

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Artificial Light Is Rewiring Your Brain

Kendall Toerner — Thu, 02 Apr 2026 00:04:08 GMT

New here? Start with this guide.

Most people think of light as something that helps us see.

Turn on a lamp.
Open a laptop.
Check your phone.

Light is treated as a visual tool.

But biologically, light is something very different.

It is one of the most powerful environmental signals the human body receives. Light doesn’t just enter the eye and create vision. It enters the eye and begins altering chemistry—changing how mitochondria work, how dopamine behaves, how circadian rhythms operate, and how the brain regulates mood, focus, and sleep.

Modern life has quietly changed that signal.

Not by removing light.

But by changing its spectrum.

(If you want the full research breakdown, I wrote the long-form article here)

The Spectral Problem of Modern Life

Sunlight contains a broad distribution of wavelengths.

Ultraviolet.
Visible light.
Infrared.

All arriving together.

Artificial lighting is very different.

Most modern indoor lighting—LEDs, screens, and fluorescent lights—produce a heavy concentration of blue wavelengths while lacking much of the infrared energy found in sunlight.

This creates a strange biological environment.

A world where blue light appears constantly but the wavelengths that normally balance it are largely absent.

To your eyes, this may seem irrelevant.

To your cells, it may not be.

Why Infrared Matters More Than Most People Realize

Infrared light plays a subtle but important role in biological systems.

One of the places it appears to matter most is in water.

Inside cells, water is not simply a passive liquid. Near biological surfaces, water organizes into structured layers sometimes called exclusion zone water.

These structured layers influence electrical charge separation and cellular energy systems.

Infrared radiation has been shown to expand and stabilize this structured water.

Why does that matter?

Because mitochondria—the energy systems inside cells—depend on stable electrical gradients and organized water layers to move electrons efficiently.

When those gradients destabilize, electron flow becomes less efficient.

And when electrons leak from the system prematurely, oxidative stress rises.

Dopamine Runs on Redox Chemistry

Dopamine is usually discussed as a psychological molecule.

Motivation.
Reward.
Attention.

But dopamine is also a redox-sensitive molecule, meaning its behavior depends heavily on the oxidative environment of the cell.

When oxidative stress rises, dopamine becomes easier to degrade.

That matters because dopamine stability influences many of the experiences people associate with mental health and cognitive performance.

Mood regulation.
Motivation.
Emotional resilience.
Focus.

If the cellular environment shifts toward oxidative imbalance, dopamine signaling may become less stable.

And that instability can ripple through many areas of daily life.

Mood, Irritability, and Anxiety

Many people notice a subtle psychological pattern during long periods indoors.

Mood becomes flatter.
Patience shortens.
Irritability increases.

Small frustrations trigger larger reactions.

These experiences are often attributed to stress or lifestyle factors, but environmental signals may also play a role.

Light affects circadian timing, mitochondrial metabolism, and neurotransmitter systems simultaneously.

When the light environment changes, the brain’s chemical landscape changes with it.

Focus and the ADHD Environment

Attention depends heavily on dopamine signaling within the prefrontal cortex.

When dopamine signaling is stable, neural circuits filter information efficiently.

When dopamine signaling becomes erratic, attention can fragment.

Modern environments present a strange combination of factors:

Constant digital stimulation.
Artificial lighting.
Minimal natural light exposure.

Interestingly, multiple studies have observed that time spent outdoors correlates with reduced ADHD symptoms in children.

The explanation is likely multifactorial—but environmental light may be one of the most overlooked variables.

Sleep Begins in the Morning

Sleep is often treated as a nighttime problem.

But circadian biology suggests something different.

The signals that determine when you fall asleep tonight begin many hours earlier—especially through light exposure.

Sunlight during the day strengthens circadian amplitude.

Artificial lighting late at night delays circadian timing.

When days are spent almost entirely indoors, circadian signals become weaker and less stable.

This can produce a familiar pattern:

Difficulty falling asleep.
Fragmented sleep.
Morning grogginess.

Why Your Eyes Get Tired

The human visual system evolved under sunlight.

Not under narrow-spectrum LEDs.

Screens concentrate high-energy blue wavelengths into a small visual field, often for hours at a time.

Without the broader spectral environment of sunlight—including large amounts of infrared energy—ocular tissues may experience greater metabolic stress.

Many people recognize the symptoms:

Dry eyes.
Headaches.
Visual fatigue.

The issue may not simply be screen time.

It may be the spectral imbalance of the environment those screens exist within.

The Modern Light Environment

For most of human history, blue light rarely appeared without infrared light.

Sunlight delivered both together.

Today the situation is reversed.

Blue light appears constantly—from screens, overhead lighting, and digital devices—while infrared exposure is drastically reduced indoors.

From a biological perspective, this creates a new environment the brain did not evolve to interpret.

And the consequences may reach further than most people realize.

A Simple Question

What would happen if the environment surrounding modern behaviors changed?

If the same actions—checking a phone, reading messages, scrolling through information—happened under sunlight instead of artificial light?

Would dopamine behave differently?

Would attention stabilize?

Would mood shift?

That’s a question worth testing.

Not through theory alone.

But through experiment.

A Small Experiment

I recently started running a simple experiment.

For one week, I only check my phone outside.

Messages, email, scrolling—anything that triggers dopamine—happens under natural light.

No complicated protocol.

Just a simple rule.

If I want to use my phone, I step outside first.

It’s a small change.

But sometimes small environmental shifts reveal much bigger biological patterns.

I’ll share what I notice in future posts.

If you’re curious about the deeper environmental biology behind this — particularly how light and cellular energy interact — I explore the full framework in my book The Sunlight Cure.

Follow elsewhere:

X / Twitter: https://x.com/UnlearnHealth_

Welcome to the Unlearn Health Podcast

Kendall Toerner — Sun, 29 Mar 2026 22:07:42 GMT

Most health advice starts with chemistry: nutrients, hormones, supplements.
This podcast starts where biology actually begins: physics.

The Unlearn Health Podcast explores health from first principles — starting with the physical forces that govern the body and working upward.

Key ideas from the episode

• Most health research focuses on adding solutions, not questioning assumptions.
• Real understanding starts with first principles.
• Biology sits on top of physics and biophysics.
• The body runs on electromagnetism created by moving electrons.
• Many health claims rely on correlations from studies rather than causal mechanisms.
• Understanding mechanisms allows you to evaluate health advice independently.

What this podcast will explore

• Light as the primary driver of biology
• Mitochondrial energy systems and redox
• Electromagnetism in the body
• Environmental signals controlling genetics
• Questioning mainstream health narratives
• Removing assumptions from current scientific dogma

What health belief do you think deserves to be questioned from first principles?

New here? Start with this guide.

You can explore more writing at unlearnhealth.com or join the discussion here on Substack.

If you’re curious about the deeper environmental biology behind this — particularly how light and cellular energy interact — I explore the full framework in my book The Sunlight Cure.

Follow elsewhere:

X / Twitter: https://x.com/UnlearnHealth_

The Busy Person’s Health Protocol

Kendall Toerner — Fri, 27 Mar 2026 00:56:23 GMT

New here? Start with this guide.

Most modern health advice assumes you have unlimited time.

Morning routines.
Meal prep.
Long workouts.
Saunas.
Ice baths.
Supplement stacks.

But most people live differently.

They work normal jobs.
They commute.
They live in suburbs or cities.
Their schedules are already full.

Yet human health is still built on a small number of environmental signals that regulate cellular energy systems.

(If you want the full research breakdown, I wrote the long-form article here)

Sunlight exposure, mechanical movement, temperature stress, nutrient-dense food, electron flow from the environment, and darkness at night all influence how mitochondria produce and manage energy.

When these signals disappear, physiology slowly drifts.

When they return—even imperfectly—many systems begin stabilizing again.

The goal isn’t turning health into a full-time job.

The goal is restoring the most important signals in the smallest amount of time possible.

A Realistic Daily Protocol for a Busy Schedule

Instead of dozens of separate routines, the day can revolve around four signal anchors:

• sunrise light
• midday digestion and sunlight
• late-day strength
• evening recovery and sleep preparation

Each anchor restores multiple environmental signals simultaneously.

1. Sunrise Walk

Before work, spend about 10–15 minutes outside.

Walking during sunrise exposure restores several critical signals:

• circadian clock synchronization
• dopamine stabilization
• retinal melanopsin activation
• movement-generated electrical current
• grounding electrons if walking barefoot on natural surfaces

Morning sunlight entering the eyes signals the brain’s master circadian clock.

This timing system regulates cortisol, dopamine, melatonin production, and mitochondrial energy rhythms.

Indoor lighting is often hundreds to thousands of times weaker than natural sunlight, which allows circadian timing to drift.

A short sunrise walk restores that signal.

2. Midday Meal and Sunlight

During a typical 1-hour lunch break, combine digestion and sunlight exposure.

Eat first

Sunlight supports the parasympathetic rest-and-digest state, which improves digestion.

Meals should be simple and mostly fat.

Examples include:

• ground beef
• pressure-cooked brisket
• eggs
• butter or ghee
• fatty seafood

Fat-heavy meals provide stable mitochondrial fuel and digest slowly, allowing many people to comfortably operate on one meal per day (OMAD) if desired.

Food preparation stays simple while nutrient density remains high.

Midday UV exposure

After eating, spend about 40 minutes outside in sunlight.

Midday sunlight contains ultraviolet wavelengths that trigger several biological processes:

• nitric oxide release from the skin
• vitamin D synthesis
• mitochondrial photobiomodulation
• immune signaling through skin chromophores

Nitric oxide released from the skin improves circulation and vascular function.

Blood moving closer to the skin surface allows chromophores such as porphyrins to interact with sunlight.

Even relatively short midday exposure restores a major evolutionary signal humans historically experienced daily.

Optional Second Meal

Some people perform better with a small meal before training.

If desired, eat again between roughly 2–4 PM, near the end of the workday.

Examples include:

• eggs and butter
• leftover brisket
• fatty fish
• bone broth

This second meal remains optional.

The protocol works with one or two meals per day.

3. Evening Strength Session

Train sometime between 4–6 PM.

The workout is intentionally simple.

It can be performed with a single kettlebell and bodyweight exercises.

A short circuit might include:

• kettlebell swings
• pushups
• bodyweight squats
• pullups or rows
• lunges or step-ups

Rotate through movements continuously for about 10 minutes.

No complicated gym setup is required.

One kettlebell and basic calisthenics provide sufficient mechanical loading.

Why short strength sessions work

Connective tissues such as fascia and collagen are piezoelectric, meaning mechanical stress generates electrical charge within the tissue matrix.

This electrical signaling influences:

• bone remodeling
• connective tissue repair
• mitochondrial signaling
• muscular adaptation

The goal is functional strength, not extreme hypertrophy.

Large bodybuilding-style muscle mass typically requires heavy loads, frequent feeding, and chronic insulin signaling that may accelerate aspects of biological aging.

Moderate strength training provides the benefits without those metabolic demands.

Do not eat after lifting

After the strength session, do not eat for the remainder of the day.

Allow the body to remain in a repair state overnight.

This supports elevated levels of:

• growth hormone
• testosterone
• cellular repair signaling

Eating immediately after lifting triggers insulin release, which can interfere with some of the repair signals activated by training.

An overnight fast allows the body to continue repairing and rebuilding tissue during sleep.

4. Sunset Reset

Around sunset, step outside briefly.

Sunset light contains a red-shifted spectrum with very little blue light, signaling the brain that nighttime is approaching.

This helps transition circadian signaling toward evening recovery.

Meditation After Sunset

After sunset exposure, spend 10–15 minutes in meditation.

Practices such as Focus-style relaxation allow the body to enter deep parasympathetic recovery while awareness remains present.

Benefits include:

• reduced stress signaling
• improved sleep onset
• nervous system recovery

But even within suburban life and a standard work schedule, restoring sunlight, movement, temperature variation, simple food, and darkness can dramatically improve health without requiring perfection or turning health into a full-time occupation.

If you’re curious about the deeper environmental biology behind this — particularly how light and cellular energy interact — I explore the full framework in my book The Sunlight Cure.

Follow elsewhere:

X / Twitter: https://x.com/UnlearnHealth_

The Winter Protocol: Light, Cold, Movement, and Food

Kendall Toerner — Thu, 26 Mar 2026 16:23:01 GMT

New here? Start with this guide.

Winter is not a problem to prevent. It is a condition the human body evolved to respond to.

When sunlight fades, biology doesn’t shut down. It changes strategy. Energy production shifts from growth to efficiency. Repair becomes more important than expansion. Signals slow down so they can sharpen.

Modern life ignores this sh…

How to Practice Cold Exposure Safely for Metabolism, Immunity, and Recovery

Kendall Toerner — Thu, 26 Mar 2026 16:16:59 GMT

New here? Start with this guide.

Cold exposure is not about toughness, shock, or forcing the body into stress.

When used correctly, cold is a seasonal signal. It replaces what strong sunlight provides in summer and helps maintain mitochondrial efficiency when light is weak.

This article builds directly on the idea that cold is the yang to sunlight. In wint…

Why Your Body Needs Ultraviolet Light

Kendall Toerner — Tue, 24 Mar 2026 22:22:22 GMT

New here? Start with this guide.

A few years ago I started looking at sunlight differently.

Not as warmth.
Not as vitamin D.

But as information.

Because the deeper you go into biophysics, the stranger the body starts to look.

Cells don’t just communicate with chemicals.

They communicate with electrons, water structure, and light.

And ultraviolet light may be one of the most important signals in that entire system.

I recently wrote a deep research article explaining the mechanisms behind this idea on Unlearn Health. This post is a simpler reflection on the core concept.

Your biology evolved in an environment filled with ultraviolet light.

Modern life quietly removed most of it.

(If you want the full research breakdown, I wrote the long-form article here)

Light Is a Signal, Not Just Energy

Most people think about ultraviolet light in two ways:

• it damages skin
• it makes vitamin D

Both are true.

But they’re incomplete.

Sunlight contains an enormous range of electromagnetic frequencies, and many molecules in the body are built to absorb specific wavelengths.

These molecules are called chromophores.

Some of the most important ones include:

• porphyrins in blood and mitochondria
• melanin in skin and nervous tissue
• DHA in the retina and brain
• aromatic amino acids inside proteins

When these molecules absorb light, they don’t simply heat up.

They translate light into electron movement, electrical signals, and metabolic changes.

Sunlight becomes biological information.

The Body Is Mostly Water — But Not Random Water

There’s another layer to this story that makes things even more interesting.

Inside living organisms, water behaves differently than the water in a glass.

Near proteins and cell membranes, water forms organized layers often called structured water or exclusion zone water.

This water behaves more like a charged gel than a liquid.

It can:

• store electrical charge
• separate electrical potentials
• influence molecular interactions

Experiments have shown that ultraviolet light can expand these structured water zones, increasing electrical potential and energy storage.

So instead of biology being driven only by slow chemical reactions, light may be influencing large organized water networks that help distribute energy across cells.

That possibility opens the door to something biophysicists call coherence.

When systems become coherent, energy moves in coordinated patterns instead of random collisions.

Why Sunlight Dilates Blood Vessels

One of the well-known effects of sunlight exposure is a drop in blood pressure.

Ultraviolet light triggers the release of nitric oxide from stores in the skin.

Nitric oxide relaxes blood vessels and increases circulation near the skin surface.

But this may do more than regulate blood pressure.

Blood is full of porphyrins, molecules that absorb ultraviolet and visible light extremely efficiently.

When circulation increases near the skin during sunlight exposure, the body may be doing something clever:

It’s bringing light-sensitive molecules closer to the incoming signal.

Sunlight is interacting not just with skin cells, but potentially with the blood itself.

Your Eyes Are a Light–Blood Interface

The retina is one of the most unusual tissues in the body.

It contains:

• extremely high concentrations of DHA
• dense mitochondrial populations
• some of the highest blood flow in the body

Large amounts of blood circulate through the retina every hour.

This means light entering the eye interacts not only with neurons but also with vascular and metabolic systems connected to the bloodstream.

Light through the eyes strongly influences:

• circadian rhythm
• hormone release
• brain activity

Your eyes act as a direct interface between environmental light and systemic physiology.

Cells May Actually Communicate With Light

In the early twentieth century, a Russian scientist named Alexander Gurwitsch made a strange observation.

Cells appeared to emit very weak ultraviolet radiation.

He called it mitogenetic radiation because it seemed to influence nearby cell division.

Decades later, physicist Fritz-Albert Popp studied these emissions further.

He found that living organisms emit extremely faint photons called biophotons.

Even more interesting, the emissions appear to be coherent, meaning they are not completely random.

Some researchers believe these photons may reflect coordination between cells.

The idea remains controversial.

But it suggests something remarkable.

Cells might not only use chemicals to communicate.

They may also use light itself.

What Happens When the Signal Disappears

For most of human history, sunlight defined the electromagnetic environment our biology experienced.

Modern life changed that dramatically.

Today many people spend most of their time in environments where:

• ultraviolet light is blocked by glass
• lighting spectra are artificial
• daylight exposure is minimal

The signal our biology evolved with has changed.

Circadian systems, metabolic regulation, and vascular signaling all depend on natural light cycles and spectral balance.

When those signals disappear, biological systems can drift out of alignment.

Environmental Interference

Another layer that rarely gets discussed is how environmental materials interact with light.

Certain metals and crystalline materials reflect or scatter ultraviolet radiation rather than absorbing it.

Examples include:

• aluminum
• heavy metals such as mercury and cadmium
• crystalline silica and quartz

Heavy metals can also bind to proteins and enzymes, altering electron transport and oxidative balance.

That doesn’t mean these materials directly cause disease through light interactions.

But it shows how biological systems rely on extremely precise electronic environments.

Small disruptions can ripple through complex signaling networks.

Health Might Be a Signal Problem

Modern medicine tends to frame disease as chemistry gone wrong.

But there may be another layer.

Living systems depend on coordinated communication.

Cells must remain synchronized with:

• each other
• the environment
• natural light cycles

When those signals stay aligned, biology tends to self-organize.

When they drift apart, regulation becomes harder.

Light is not the only signal that matters.

But it may be one of the most important ones we’ve quietly removed from our lives.

The Big Idea

Your body evolved under sunlight.

Not constant sunlight.

But changing sunlight across the day and across the seasons.

Inside that environment, molecules, water networks, and metabolic systems learned to interpret those signals.

Modern life didn’t remove the sun.

But it changed the signal enough that biology may still be trying to recalibrate.

And if there’s one idea worth keeping in mind, it’s this:

Your body isn’t just reacting to light.

It’s listening for it.

If you’re curious about the deeper environmental biology behind this — particularly how light and cellular energy interact — I explore the full framework in my book The Sunlight Cure.

Follow elsewhere:

X / Twitter: https://x.com/UnlearnHealth_

Leaky Gut Experiment: A 3-Phase Protocol to Test Leaky Gut and Recovery

Kendall Toerner — Tue, 17 Mar 2026 16:00:45 GMT

New here? Start with this guide.

Most people are trying to fix their gut.

I wanted to see if mine was even capable of fixing itself.

Why the Longest-Living Humans Aren’t Athletes

Kendall Toerner — Tue, 10 Mar 2026 14:02:41 GMT

New here? Start with this guide.

For decades we’ve been told that exercise is the foundation of health.

The more you move, the healthier you become. Push harder. Train longer. Build endurance.

But if extreme exercise were the key to longevity, we would expect the longest-living humans to look like elite athletes.

They don’t.

The people who routinely reach extreme ages — centenarians — almost never resemble competitive athletes.

They are not ultra-lean.
They are not highly muscular.
And they almost never spent their lives pushing their bodies through intense training.

Instead, their lives tend to follow a different pattern entirely.

(If you want the full research breakdown, I wrote the long-form article here)

The Centenarian Pattern

Centenarians share a number of lifestyle traits.

They tend to:

move regularly throughout the day
spend significant time outdoors
eat simple diets
maintain strong social connections
experience relatively low chronic stress

But one trait stands out.

They rarely engage in intense athletic training.

Most centenarians simply live physically active lives — walking, gardening, carrying objects, working with their hands.

Their movement is steady and moderate.

It rarely resembles modern endurance training.

Athletes Age Differently

Elite athletes often show a very different pattern.

Their bodies are capable of extraordinary performance during their peak years.

But those same bodies frequently accumulate long-term wear.

High-level endurance athletes experience increased rates of certain cardiovascular conditions, including atrial fibrillation.

Joint degeneration is also common among people who spend decades training intensely.

Many former athletes remain healthy into older age, but the pattern of extreme longevity — living well beyond 100 — rarely appears among elite competitors.

This raises an interesting possibility.

Perhaps the biology that supports peak performance is not the same biology that supports maximum lifespan.

Performance vs Longevity

Athletic training pushes the body toward one goal: performance.

To achieve that goal, the body adapts in several ways:

increasing stress hormone responses
pushing metabolic systems toward high output
increasing oxidative stress during intense effort
prioritizing muscle performance over long-term cellular maintenance

These adaptations can dramatically improve physical capability.

But they may not always align with the biological priorities required for extreme longevity.

Longevity seems to favor stability.

Performance favors intensity.

The Role of Recovery

Another important factor is recovery.

Intense training repeatedly pushes the body into states of physical stress and tissue damage.

In younger individuals, repair systems generally keep up.

But over many decades, the cumulative burden of repair can become significant.

This doesn’t mean movement is harmful.

Movement is essential.

The question is how much stress the body is designed to absorb repeatedly over a lifetime.

Moderate daily movement appears to stimulate repair and metabolic health without overwhelming the body’s recovery systems.

Extreme training may shift that balance.

Look at Other Primates

If we look at our closest evolutionary relatives, the pattern becomes even more interesting.

Wild primates do not engage in extended endurance exercise.

They move regularly throughout the day.

But their movement tends to occur in short bursts — climbing, walking, foraging, and occasional brief sprints.

Long periods of continuous intense exertion are rare.

Their activity patterns resemble moderate daily movement far more than modern athletic training.

Movement vs Overtraining

This distinction matters.

The comparison isn’t between exercise and inactivity.

The comparison is between moderate movement and extreme training.

Moderate movement appears to support:

metabolic flexibility
mitochondrial health
stable hormone signaling
long-term tissue integrity

But pushing the body toward maximum output repeatedly may introduce different trade-offs.

Especially over many decades.

The Environment Matters Too

Another piece of the longevity puzzle is the environment the body operates in.

The longest-living populations often spend large amounts of time outdoors.

Natural light exposure helps regulate circadian rhythms.

Circadian rhythms influence mitochondrial function, hormone regulation, and cellular repair systems.

These processes affect how efficiently the body produces energy and maintains tissue integrity.

When environmental signals like light and circadian timing remain stable, biological systems tend to operate more efficiently.

Over a lifetime, that stability may matter more than peak physical performance.

Longevity Favors Balance

None of this suggests that exercise is harmful.

Movement is fundamental to human health.

But the type of movement that supports extreme longevity may not resemble the modern image of athletic fitness.

The longest-living humans rarely push their bodies to extremes.

Instead they tend to move steadily throughout life.

They walk.

They work.

They remain physically engaged with their environment.

But they rarely train like athletes.

Longevity, it seems, favors balance rather than intensity.

If you’re curious about the deeper environmental biology behind this — particularly how light and cellular energy interact — I explore the full framework in my book The Sunlight Cure.

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The Signal Clarity Protocol

Kendall Toerner — Sun, 08 Mar 2026 10:03:50 GMT

New here? Start with this guide.

A lot of health advice today quietly implies that modern life itself is the problem.

Screens.
Cities.
Technology.
Artificial light.

But rejecting modern life isn’t realistic—and it isn’t necessary.

The real issue is simpler.

Most people don’t understand how the environment shapes their biology.

Once you recognize the signals that…

Why Cancer May Be Nothing to Fear

Kendall Toerner — Thu, 05 Mar 2026 07:02:23 GMT

New here? Start with this guide.

Cancer is one of the most feared words in the world.

But what if the fear comes from misunderstanding what cancer actually is?

Most people imagine cancer as something that suddenly attacks the body — rogue cells multiplying out of control for no reason.

But when you zoom out and look at cellular metabolism, a different picture starts to emerge.

One that is far less mysterious.

And far less frightening.

(If you want the full research breakdown, I wrote the long-form article here)

Cells Don’t Randomly Rebel

Cells are not chaotic.

They are extremely responsive to their environment.

Every second, your cells are evaluating signals like:

energy availability
oxygen levels
redox balance
damage signals
nutrient flow

Based on those signals, a cell decides whether to:

repair itself
divide
pause growth
or self-destruct

This decision system normally works remarkably well.

But like any system, it depends on clear signals and reliable energy.

When those degrade, the decisions begin to change.

The Warburg Clue

Nearly 100 years ago, Otto Warburg noticed something strange.

Cancer cells stop relying on normal mitochondrial respiration and instead shift toward fermentation.

At first this looked like a defect.

But it may actually be a survival strategy.

Fermentation is inefficient, but it allows a cell to keep generating energy when mitochondria are struggling.

It’s a metabolic fallback mode.

From that perspective, cancer starts to look less like a random malfunction and more like an adaptation to poor energy conditions.

When Cellular Signals Become Noisy

Healthy metabolism depends on clean electron flow through the mitochondria.

This electron movement produces tiny reactive signals that help coordinate cellular behavior.

Those signals regulate things like:

DNA repair
growth timing
apoptosis (programmed cell death)
immune detection

But when mitochondrial function deteriorates, those signals become distorted.

Cells begin receiving incomplete or inaccurate feedback about their own state.

Repair systems slow.

Apoptosis stops activating when it should.

And gradually, order begins to break down.

Cancer Often Appears When the System Loses Its Coordination

The body actually has multiple safeguards to prevent this.

Two of the most important are:

Autophagy — recycling damaged cellular components.

Apoptosis — removing cells that can’t be repaired.

These systems work extremely well when energy signaling is intact.

But when cellular energy becomes unstable, those safeguards can fail.

The result is not immediate chaos.

It’s slow disorganization.

Cancer is often what that disorganization looks like at the cellular level.

The Fear Narrative

Modern medicine often frames cancer as a war.

Something foreign that must be attacked.

But the cells involved are still your own cells.

Which means the deeper question isn’t just:

“How do we destroy them?”

It’s also:

“What conditions led cells to behave this way in the first place?”

That shift in perspective changes the emotional response dramatically.

Instead of fear, you start asking better questions about the environment cells are responding to.

The Part Most People Miss

Biology is not just chemistry.

Cells are constantly responding to environmental signals.

Things like:

light exposure
electromagnetic environments
circadian timing
temperature signals
metabolic inputs

These signals shape mitochondrial function and cellular energy.

When they drift far from the conditions humans evolved in, cellular coordination becomes harder to maintain.

Over time, that instability can show up in many different ways.

Cancer is one of them.

Understanding Removes Fear

Fear comes from believing the body is fragile and unpredictable.

But biology is usually responding to signals.

And signals can change.

Once you understand that, cancer stops looking like a mysterious enemy.

It starts looking like a biological warning system that something deeper has gone wrong.

That shift alone removes a surprising amount of fear.

If you’re curious about the deeper environmental biology behind this — particularly how light and cellular energy interact — I explore the full framework in my book The Sunlight Cure.

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Get The Sunlight Cure on Amazon

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My Book - The Sunlight Cure™

Kendall Toerner — Thu, 05 Mar 2026 00:45:44 GMT

New here? Start with this guide.

Most health advice focuses on diet, supplements, and exercise.

But there is a far more fundamental input your biology depends on:

Light.

If you struggle with poor sleep, low energy, stubborn fat, premature aging, anxiety, or chronic health issues, the problem may not be what you’re eating — it may be the light signals your body receives every day.

Modern humans spend most of their lives indoors, behind glass, under artificial lighting, and disconnected from the natural electromagnetic environment that shaped human biology for millions of years. As a result, many of us are unknowingly living in a state of light deficiency and distorted light exposure.

Backed by more than 200 scientific studies and references, The Sunlight Cure™ reveals how light acts as a fundamental biological signal that regulates:

• Sleep and circadian rhythms
• Metabolism and fat burning
• Hormones and dopamine
• Skin quality and visible aging
• Immune function and inflammation
• Brain performance and mood
• Cellular repair and longevity

Most people are unaware that biology operates through electromagnetic signaling. Light interacts with the electrical charges inside our cells, influencing how our genes are expressed, how our mitochondria produce energy, and how tissues repair themselves.

This means that light exposure doesn’t just affect how you feel — it affects how your body is built.

Improper light environments can influence:

• Facial structure and skin quality
• Fat storage and muscle tone
• Sensitivity to sunlight
• Hormone balance
• Long-term disease risk

In The Sunlight Cure, you’ll discover why many modern habits — including indoor living, artificial lighting, sunglasses, windows, and certain technologies — disrupt the natural signals your body relies on to function optimally.

Written in clear, accessible language, this book explains the science of light and human biology without requiring a background in physics or medicine.

You will learn:

• Why sunlight has been misunderstood and wrongly feared
• How modern lighting disrupts sleep, metabolism, and mental health
• The role of electromagnetic signals in cellular health
• Why some people thrive on the same diet while others struggle
• How reconnecting with natural light can restore energy, resilience, and vitality

Drawing on both scientific research and the author’s own journey from the tech world of Silicon Valley to a nature-centered health philosophy, The Sunlight Cure challenges conventional assumptions about health and reveals a missing piece of the modern wellness puzzle.

If you want to understand one of the most overlooked factors shaping human health today, this book will change the way you think about sunlight, technology, and the environment around you.

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This protocol is an implementation expansion on the concepts discussed on unlearnhealth.com

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The Third State of Nature Anti-Aging Protocol

Kendall Toerner — Sun, 01 Mar 2026 08:49:31 GMT

Core Objective

Create a biological environment where:

Solar UV and infrared are high
Circadian amplitude is strong
Dopamine timing is stable

The NRF2 Environmental Hormesis Protocol

Kendall Toerner — Sun, 01 Mar 2026 08:28:55 GMT

This protocol is an implementation expansion on the concepts discussed on unlearnhealth.com

Your body does not need borrowed antioxidants.
It needs structured oxidative signaling.

This protocol shows you how to stimulate NRF2 to increase protective antioxidants the way human biology evolved to do it — through environmental hormesis.

Start Here: Why Unlearn Protocols Exists

Kendall Toerner — Mon, 23 Feb 2026 05:34:34 GMT

Most people do not need another list of health tips.

They already know they should sleep better, eat better, move more, get outside, reduce stress, and stop staring at screens all night. The problem is not awareness. The problem is sequence.

Modern life disrupts biology from every direction at once. It changes the light you see in the morning, the light you see at night, the temperature your body feels, the amount of real sunlight your skin receives, the electromagnetic environment around your cells, the rhythm of your meals, the way you move, the way you recover, and the way your nervous system experiences time.

The sunset from my favorite hike, the moment I realized the sun and environment were the answer to vitality

When all of those inputs are misaligned, isolated advice starts to feel weak. A supplement cannot fix a broken light environment. A perfect diet cannot fully override circadian confusion. A workout plan cannot replace the biological information your body expects from sunlight, darkness, temperature, movement, and season.

That is why this protocol library exists.

Unlearn Protocols is the practical side of Unlearn Health. It is where the ideas become actions, experiments, sequences, and daily changes you can actually apply.

Start With the Environment

The central idea is simple:

Your body is not just running on food, calories, habits, or willpower. It is constantly reading the environment around it.

Light tells your biology what time it is. Darkness tells it when to repair. Sunlight delivers information that indoor light cannot copy. Temperature changes energy demand. Movement creates mechanical and electrical signals through tissue. Water changes how proteins fold, conduct, and respond to light. Food enters this larger context, but it does not replace it.

Modern life has made many of these signals weaker, flatter, or completely inverted.

Most people now wake up indoors, spend the brightest part of the day under artificial light, see too little ultraviolet and infrared light, sit behind glass, live in climate-controlled rooms, eat under unnatural lighting, and then expose their eyes and skin to bright screens after sunset.

The body adapts to that environment, but not always in the direction you want.

Unlearn Protocols is about changing the inputs.

What You’ll Find Here

This publication is not meant to be a random stream of wellness posts. It is a protocol library built around environmental repair.

Some posts are free because they introduce the core mental models. Others are for paid subscribers because they go deeper into implementation, sequencing, troubleshooting, and practical use.

The focus is on protocols for real life, including:

Morning sunlight and circadian anchoring
Artificial light reduction at night
Sun adaptation and UV tolerance
Darkness, sleep timing, and recovery
Seasonal rhythm and metabolic context
EMF reduction and environmental simplification
Dopamine, stimulation, and attention
Heat, cold, and hormetic stress
Food timing and light context
Practical experiments for rebuilding capacity

The goal is not to make your life more complicated. The goal is to help you identify which environmental inputs are creating the most friction, then correct them in a sane order.

Why Sequence Matters

A lot of people try to change their health by adding more.

More supplements. More tracking. More devices. More tests. More routines. More hacks.

But if the foundation is misaligned, adding more often creates noise.

The Unlearn approach usually begins by removing the most damaging mismatches first. Not everything needs to be optimized at once. In many cases, the first step is simply to restore the basic signals your body expected all along: morning light, darker nights, real sun exposure, outdoor time, movement, seasonal awareness, and less artificial stimulation.

That sequence matters because biology is contextual.

A protocol that helps one person may overwhelm another person if their light environment, sleep timing, skin tolerance, stress level, or mitochondrial capacity is not ready for it. The better question is not “What is the best hack?” The better question is “What input is my body missing, and what should be restored first?”

That is the kind of question this library is built around.

A Good First Step

If you are new, start with light.

Light is the master environmental signal for modern humans because it has been distorted more than almost anything else. We live with dim mornings, weak daytime light, filtered sunlight, bright nights, blue-heavy screens, indoor LEDs, and very little true darkness.

Before worrying about advanced protocols, start by rebuilding your relationship with the sun and the night.

Get outside early. Let your eyes receive real outdoor light. Spend more time in full-spectrum daylight. Stop treating sunlight as an occasional wellness accessory. Dim your home after sunset. Reduce screen brightness at night. Make darkness feel normal again.

This is not a small change. It is one of the most basic ways your body understands time, energy, mood, repair, and seasonal rhythm.

Free and Paid Posts

The free posts are designed to help you understand the framework. They introduce the ideas, the language, and the reason modern health advice often feels incomplete.

The paid posts are for people who want more structure. They go deeper into how to apply these ideas, how to sequence changes, how to avoid common mistakes, and how to think through real-world constraints.

Paid subscribers are not just paying for “more content.” They are getting access to the practical layer: the protocols, experiments, and implementation logic behind the Unlearn approach.

How This Connects to the Bigger Unlearn Health World

Unlearn Protocols is only one part of the larger project, but it is the part built for execution.

If you found this through Sunlight Ken, that is usually the first spark. The short videos are meant to make the ideas simple, visible, and immediate.

If you want the the full knowledge library (podcast, articles, frameworks, deep explanations, and theories) that lives at Unlearn Health.

If you want interactive tools, scores, and calculators that help you evaluate your own environment, that lives in Unlearn Lab.

If you want personal review and deeper guidance, that lives in Unlearn Sessions.

But Unlearn Protocols has a specific job: to help you apply the ideas yourself.

You do not need to understand the whole ecosystem before starting. You only need to begin with the inputs that matter most.

The Main Paths

The Sunlight Cure™ Book & System is the book and foundational protocols/frameworks behind the sunlight-first philosophy.

Unlearn Health is the main library for deeper articles and first-principles explanations.

Unlearn Protocols is this publication: the practical library for implementation.

Unlearn Lab is the interactive layer for tools, scores, calculators, and personalized environmental inputs.

Unlearn Sessions is the personal guidance layer for people who want help applying the framework to their own life.

The Unlearn Health Podcast is the slower audio layer for longer explanations, reflections, and deeper conversations.

Each layer has a different purpose. You do not need all of them at once.

Start where you are.

What This Is Really About

Modern life does not only change your habits. It changes the signals your biology uses to regulate itself.

It changes when you see light, when you experience darkness, how often you feel temperature variation, how much real sun reaches your skin, how often you move, how much stimulation your nervous system receives, and how connected your body is to the natural rhythms it evolved inside.

Unlearn Protocols exists because those inputs are adjustable.

You can rebuild your light environment. You can restore darker nights. You can increase real outdoor exposure. You can become more tolerant of sun. You can reduce unnecessary artificial stimulation. You can change the rhythm of your days so your biology receives clearer information.

This is not about chasing perfection.

It is about restoring the basic environmental signals that make energy, mood, sleep, skin, metabolism, and drive feel more natural again.

Start Here

Begin with the simplest question:

What part of my environment is sending my body the wrong signal every single day?

For many people, the answer is light.

So start there. Get more real light early in the day. Make your nights darker. Spend more time outside. Pay attention to the difference between sunlight through glass and sunlight on your skin. Notice how your energy, sleep, appetite, mood, and motivation respond when your body receives clearer timing signals.

Then keep going.

The protocol library is here to help you rebuild one layer at a time.

Free Foundations

If you’re new, begin here with these free posts:

• Why You’re Not Tired — You’re Light Confused
• Why You Burn in the Sun (And It’s Not Just About SPF)
• Why Time Feels Like It’s Speeding Up
• Why Winter Makes You Crave Fat

These build awareness.

They recalibrate perception.

But awareness alone does not change physiology.

The Paid Protocol Library

For advanced structured implementation.

This is not a collection of tips. It is a sequenced system of environmental health recalibration.

Inside are structured paid systems like:

The Third State of Nature Anti-Aging Protocol
The Artificial Light Detox Protocol
The UV Callus Protocol
The Dopamine Architecture Framework
The Winter Metabolic Reversal Protocol
Seasonal transition systems
Environmental capacity expansion frameworks

Each protocol includes roughly:

• Entry criteria
• Environmental setup
• Correct sequencing
• Seasonal timing
• Failure pattern correction

If you’re curious about the deeper environmental biology behind this — particularly how light and cellular energy interact — I explore the full framework in my book The Sunlight Cure™.

Follow elsewhere:

X / Twitter: https://x.com/UnlearnHealth_

Why Winter Makes You Crave Fat

Kendall Toerner — Mon, 23 Feb 2026 05:25:04 GMT

New here? Start with this guide.

Every winter, the same question appears:
Why am I craving heavier food?

More fat.
More protein.
Less fruit.
Fewer carbohydrates.

Most people interpret this as weakness.

Or lack of discipline.

But what if it’s not psychological?

What if it’s environmental?

Metabolism does not run on food alone.

It runs on light.

Your Body Measures the Length of the Day

As daylight shortens:

Ultraviolet exposure decreases
Solar angle lowers
Evenings lengthen
Temperatures drop

These signals reach the brain before you consciously notice them.

The circadian system detects shorter photoperiods and begins shifting hormone timing.

Melatonin rises earlier.
Cortisol timing adjusts.
Appetite signals change.

Metabolism begins preparing for a different fuel mix.

Why Fat Becomes More Appealing

In shorter-day environments, biology often favors:

Greater reliance on fat oxidation
Improved efficiency in cooler temperatures
Reduced carbohydrate tolerance

Fat is a stable, slow-burning fuel.

Carbohydrates are fast and more often aligned with high-light, high-activity seasons.

In summer, when sunlight is intense and days are long, carbohydrate tolerance often increases naturally.

In winter, the system shifts toward conservation and efficiency.

Ignoring this shift can feel like metabolic friction.

The Artificial Summer Problem

Modern environments erase seasonal signals.

Bright overhead lighting at night.
Heated indoor spaces.
Screens until midnight.

The brain receives mixed input:

Light says summer.
Calendar says winter.

This mismatch creates confusion:

Late-night hunger
Cravings that feel chaotic
Sleep disruption
Energy instability

Many people blame willpower.

The real issue is environmental contradiction.

Why Keto Fails for Some People

Strict low-carbohydrate diets often fail when light environment is not addressed.

If someone attempts fat adaptation while:

Staying under bright artificial light at night
Waking late without morning sunlight
Ignoring seasonal changes

The body receives conflicting signals.

Diet alone cannot override circadian input.

Light leads.

Food follows.

A Simple Seasonal Experiment

For one week:

Get outside within 30 minutes of waking.
Dim lights after sunset.
Reduce late-night carbohydrates first.
Increase protein at your first meal.

Do not eliminate carbohydrates entirely.

Just observe.

Notice:

Hunger timing
Evening cravings
Sleep onset
Morning energy

Most people feel more stable within days.

Winter Is Not a Diet

Winter is a signal.

Shorter days and lower light intensity communicate a shift in environmental energy.

Historically, fuel availability changed with season.

Today, food stays constant while light changes dramatically.

That mismatch is new.

And biology has not adapted to it.

Signs You May Be Out of Sync

Strong late-night hunger
Cravings that feel impulsive
Difficulty sleeping before midnight
Energy crashes despite “clean” eating
Feeling wired but tired

These are often light timing issues, not macro issues.

The Bigger Picture

Seasonal eating is not about trends.

It is about alignment.

When light shortens:

Sleep should deepen
Evenings should quiet
Fuel preference may shift
Exploration often decreases

When light expands in summer:

Activity increases
Carbohydrate tolerance rises
Dopamine-driven behavior expands

Ignoring season creates friction.

Respecting season creates flow.

If This Feels True

There is a structured way to intentionally enter winter metabolism:

Light reduction sequencing
Gradual carbohydrate adjustment
Cold exposure timing
Protein distribution
Seasonal dopamine alignment

But start with light.

Because metabolism listens to the sun before it listens to your diet.

And when the environment is aligned, cravings often make sense.

If you’re curious about the deeper environmental biology behind this — particularly how light and cellular energy interact — I explore the full framework in my book The Sunlight Cure.

Follow elsewhere: