Nathan Siles was diagnosed with his second cancer at twenty-four — retinal cancer at eight months, testicular cancer at twenty-four — while working in investment banking, competing as a professional swimmer and soccer player, eating well, taking supplements, and doing all the things he had been taught to do for health. The diagnosis sent him into a decade-long pilgrimage through the foundations of human biology: he studied under Dr. Jack Kruse, traveled to Europe and the Netherlands to meet with biophysicists and photoendocrinologists, spoke with water researcher Gerald Pollock in Seattle, studied under mitochondrial biophysics specialists Doug Wallace and Nick Lane, moved to the tropics to implement the full sunlight-grounding-magnetism triad, and then went to the cenotes and volcanoes of Mexico to access basalt-based magnetic grounding that doubled his health markers again. He has worked with thousands of patients over eleven years — stage four cancers, autism, Parkinson's, chronic disease — producing recoveries through environmental and light biology interventions. He is legally blind with 10% vision from radiation administered to his retinal cancer at eight months of age. He founded Biospectral Systems to bring the full-spectrum blue-blocking glasses, full-spectrum light bulbs, and grounding infrastructure that his protocols require into accessible, purchasable form. He is the author of BioTra: An Approach to Healthy Living in a Modern World. He is planning a full second episode post this one — this barely scratched the surface.
I have been telling anyone who would listen about light, grounding, sunrise, and the ancestral foundations of recovery for years now — and I say it knowing that most people hear it as hippie stuff until they feel it themselves. Nathan Siles is the biophysics layer underneath everything I have been experiencing and sharing. Two cancers, a pilgrimage through the world's leading researchers, eleven years of patient work, and a framework that I believe is the most fundamental bridge to the gaps that neither the supplement industry nor the pharmaceutical industry will ever close for us. This is health sovereignty. This is Stop Killing the Plants territory. This one matters.
I will be ordering Biospectral blue blockers immediately. I say this not as an advertisement but as a personal statement: this episode changed how I think about what I have already been doing and why it works. Nathan is coming back for a full part two. We barely scratched the surface. What follows is the framework he laid in this conversation and why every midlife grappler who is doing the sunrise, the grounding, the cold, and the sauna deserves to understand what is actually happening in the biology underneath those practices.
Second Cancer at Twenty-Four: The Come-to-Nature Moment That Built a Decade of Research
Nathan was doing everything right by conventional standards. Eating well, juicing, protein shakes, supplements. Professional swimmer, soccer player, occasional grappling on weekends. Investment banking career on track. Then his second cancer arrived at twenty-four and the entire framework collapsed — because a system that was supposed to prevent disease had not. He had to ask a question that conventional health education never prepares you to answer: what is actually causing this in my body?
He found Dr. Jack Kruse — a biophysics specialist with a neurosurgery background whose work flipped everything he thought he knew on its head. Cruz's value, Nathan says, is not that he has all the answers — it is that he punches you out of the "I think I'm good" mindset and sends you to the primary sources. Nathan went to the primary sources. He traveled to Europe, to Germany, to the Netherlands. He spoke with the people who write the medical school textbooks — Gerald Pollock on structured water in Seattle, Doug Wallace and Nick Lane on mitochondrial biophysics. He did not just study the theories. He studied the people who built them.
"Nature makes no mistakes. And you are perfect. Every output your body, mind, and spirit is producing right now is based upon the inputs going into it. Change the inputs — change the outputs."
— Nathan Siles · Biospectral Systems · biospectralsystems.comWhat emerged from the chemotherapy recovery — when his sleep became deep for the first time, his hormones aligned, his energy transformed — was verified by thousands of biological tests: HRV, blood markers, urine, every measurable thing he could track over months and years. He moved to the tropics and implemented sunlight, grounding, and ocean immersion. His markers improved dramatically. He moved to the cenotes and basalt volcanic regions of Mexico and implemented the magnetic component — the missing third leg of the light-water-magnetism triad he had not yet addressed. His markers doubled again. He has been building on that foundation ever since.
How Light Actually Controls Everything: Eye, Skin, Gut, Lung — The Four Surfaces
The organizing framework Nathan uses for understanding how the environment interacts with the human body is the four surfaces: eye, skin, gut, and lung. Each of these surfaces picks up environmental signals — light, temperature, sound, magnetic fields, frequency — and translates them into biological language the body can act on. These are not metaphors. They are physiological mechanisms built over millions of years of evolution in a natural light environment that the modern world has systematically disrupted.
Light enters the cornea and is transduced through multiple photoreceptors — melanopsin, neuropsin, conopsin — sending DC electricity through the central retinal pathway to the suprachiasmatic nucleus (SCN) in the hypothalamus. The SCN is the master clock: it tells every cell in the body what time it is, when to produce hormones, when to detox, when to demand energy. Separately, specialized cells called Müller cells act as fiber optic cables, tunneling light photons directly to the lateral habenula — the brain structure governing motivation and executive function. Forty percent of your executive function is directly governed by the light entering your eye at any given moment. This is not a metaphor. This is fiber optics in your brain.
The skin contains the same non-visual photoreceptors as the eye — because both develop from the neural ectoderm and serve the same fundamental purpose. When the eye pathway is compromised — cataracts, macular degeneration, retinal scarring, myopia, neurodegeneration — the skin becomes the backup pathway, sending light signals to the hypothalamus and habenula through the same ultimate biological targets. Nathan is legally blind with 10% vision from retinal cancer radiation at eight months of age. His skin is doing a significant portion of the work that his eyes cannot. This is why artificial light on skin is not merely aesthetic — it is sabotaging a critical biological signaling pathway.
The gut's enterochromaffin cells and the entire gut lining are picking up biophotonic signals from what you eat and drink. Food and water, Nathan argues, are light in storage — you are eating compressed photonic information, and when you digest it, you are unpacking the light. This is why seasonal, local food matters beyond nutrition: a banana imported from Brazil in a Florida winter is carrying light information from a tropical high-UV environment into a low-UV body operating on winter circadian rhythms. The mismatch sends confusing signals. The gut then cannot tell the liver what time it is with precision — and the downstream effect is dysregulated detoxification, hormone production, and energy demand.
The lungs interact with the environment primarily through ions in the air — the reason that forest bathing, ocean exposure, and open-window sleeping produce measurable biological effects that indoor filtered air does not. The lungs are also picking up biophotonic signals circulating within the body's internal light system. This is the least discussed of the four surfaces and the one with the most to discover — but the empirical reality of ion therapy, negative ion environments, and the documented effects of different air environments on recovery make it as actionable as the others.
The organizing principle across all four: the human living system requires energy, information, timing, and structure. When all four inputs align — full-spectrum natural light, seasonal food and water, grounded magnetism, appropriate sound and frequency environment — the body does not need to be told what to do. It already knows. It has always known. The modern world has drowned out the signal with noise.
Why Screen Time After Sunset Is Eating a Bite of Cheesecake — Every Hour
The leptin revelation is the most practically urgent piece of information in this conversation for the midlife grappler who is intermittent fasting, working on body composition, and wondering why the results plateau. Nathan's framing is direct: most people who discuss autophagy — the cellular recycling process that fasting is supposed to unlock — have no idea that leptin governs it. And most people who discuss leptin have no idea that leptin is governed primarily by light, not food.
Leptin — which Nathan calls the master hormone, governing all the others — responds to light timing, temperature, grounding, EMFs, and sound and magnetic fields. It responds to food timing only secondarily. When you look at a screen after sunset, the artificial blue and green light signals leptin as though food is present. Your eighteen-hour fast is biochemically undermined — Nathan's comparison is exact: every hour of screen time after dark is equivalent to eating a bite of cheesecake. The autophagy window you have been protecting through dietary discipline is collapsing in real time through your retinas.
"That 17 or 18 hours of autophagy you're waiting to kick in? It's not going to kick in with the force you imagine if you're viewing blue and green light after sunset. Light governs leptin. Leptin governs autophagy. Stop eating and stop viewing artificial light after sunset — that is your cutoff."
— Nathan Siles · Biospectral Systems · biospectralsystems.comThe cascade that correct light management unlocks is one of the most compelling sequences in this conversation. Darkness and food cutoff → leptin normalizes → melatonin rises → prolactin rises → growth hormone peaks at 1–3 AM → autophagy, apoptosis in cancer cells, protein synthesis, collagen folding, new brain cell construction. If you wake between 1 and 3 AM — for any reason — you are breaking the growth hormone pulse. Vasopressin is not working. Dopamine is too high. The brain is not asleep when it needs to be most productive. The entire recovery cascade is interrupted.
For the midlife grappler doing BJJ five or six days a week who is not recovering at the rate the training demands: the question Nathan asks is not what supplement you are missing. It is what time did you stop looking at your screen last night, and what was in your light environment between sunset and sleep. The answer to that question is almost always the gap between what the body is producing and what it is capable of producing.
There Is No Recovery Without This: Building the Bedroom Biosphere
The sleep sanctuary is Nathan's term for the environmental prerequisite for genuine recovery — and it is the section of this conversation that I want every person training hard, working long days, and trying to manage a midlife body to sit with before they add another supplement or protocol. There is no supplement that compensates for sleeping in an environment that is actively working against your biology.
- Near-zero artificial EMFs during sleep. Every wireless device — phone, router, Bluetooth speaker, smart appliance — in the sleeping environment is producing pulsed radiofrequency radiation that the body was not designed to receive during the parasympathetic rest state. Nathan's minimum viable version: airplane mode on all devices, router on a timer that cuts off at bedtime, and ideally the bedroom circuit breaker switched off.
- Earth connection — but not through house wiring. Grounding sheets and mats that plug into wall outlets in the presence of live power are — in Nathan's assessment based on work with building biologists — likely net negative for the first two to three weeks, elevating cortisol before the adrenals eventually exhaust. The correct method: a grounding rod out the window, two to three feet into earth with no live power near it, or Biospectral's forthcoming filtered grounding plug that will allow wall connection without introducing dirty electricity fields through the body.
- No artificial light — blackout blinds or a silver-mesh bed canopy. Any photons entering the eye during sleep interfere with the melatonin cascade. In apartments without blackout capacity, a silver-woven mesh bed canopy — Nathan's reference is Princess Jasmine from Aladdin, which is accurate and memorable — blocks both light and some EMF from above and around the sleeping environment.
- 65–70°F sleeping temperature with natural fiber sheets. Sleep temperature is not a comfort preference. It is a biological requirement for the heart rate drop — 20 beats from active day to sleep — that signals the brain and heart to enter recovery mode. When both the brain and the heart go to sleep properly, growth hormone pulses, autophagy activates, collagen folds, new proteins are synthesized.
- Fresh air where possible. Open windows. The ion environment of outdoor air is different from filtered indoor air, and the lungs' interaction with that ion environment is part of the recovery cascade rather than separate from it.
The statement Nathan makes about recovery that I want to repeat plainly: there is no way to recover from BJJ-stretched tendons, nine hours under office fluorescents, or a twelve-hour international flight without a sleep sanctuary. The recovery stack of supplements, peptides, and protocols being applied in the wrong environment is building on sand. The environment is the foundation, and the foundation has to be addressed before anything added on top of it can perform at its potential.
"There's no way we're recovering from BJJ, from nine hours under fluorescence, from a twelve-hour flight — while we're not sleeping in a sanctuary with almost zero man-made EMFs, an earth connection, no artificial lights, and blackout blinds."
— Nathan Siles · Biospectral Systems · biospectralsystems.comDepth in the Ice Bath: Why Bottom Lip and the Trigeminal Nerve Change the Protocol
This section is directly personal — Nathan reviewed what he sees in my ice bath content and gave me the upgrade I did not know I needed. Two specific additions that change the protocol significantly for everyone who has been doing cold exposure without these components.
The bottom lip threshold. Going submerged to the bottom lip — not the chin, the bottom lip — activates the carotid arteries and the entire arterial system, plus the supraclavicular brown fat deposits above the collarbone and the brown fat along the back of the neck and upper spine. Brown fat is dense with mitochondria that produce heat by burning metabolic fuel at temperatures up to 132 degrees internally. When they burn, they release infrared light internally. That infrared light structures the water throughout the body. Structured water — Nathan's framework from Gerald Pollock — transfers energy exponentially faster than unstructured water, like rolling something across an ice skating rink rather than through mud. More brown fat activation means better non-shivering thermogenesis, better internal water structuring, better quantum tunneling of energy through the body's systems.
The face plunge and the trigeminal nerve. Rather than full head dunks, Nathan recommends face plunges — submerging to just below the ear canal, covering the entire face without water entering the ears. The trigeminal nerve (fifth cranial nerve) has three branches that come right to the surface of the face: above the upper lip, below the bottom lip, and between the eyes. Cold stimulation of the trigeminal nerve triggers bradycardia — slowing the heart rate — activates the vagus nerve, and opens what Nathan calls a parasympathetic portal. It detoxes lymphatic fluid from the brain through Meckel's cave. A fifteen-to-thirty-second breath hold in the face plunge position produces, within forty-five seconds, the deepest meditative relaxation state available in any practice he has tested or taught. He has run workshops on this. The transformation he describes in participants — from scared and nervous to permanently changed — in under a minute is consistent across every group.
A two-dollar silicone snorkel is the tool. Face down, to below the ear canal, breath hold, trigeminal activation. I am getting a snorkel today.
Health Is Free. Fear Is a Choice. You Are Already Perfect.
The framing Nathan offers for why conventional medicine and the supplement industry consistently miss the most important levers of health is clear and worth sitting with: profit requires fear. If you are afraid of the sun, you will buy sunscreen. If you are afraid of death, you will take the nearest remedy offered to you by the nearest white coat. Fear is monetizable. Health — real ancestral health built on light, water, magnetism, and time in nature — is almost entirely free. That is not an accident. It is structurally incompatible with a profit model.
His advice for the person who has been on the measurables treadmill — the wearable, the blood work every six weeks, the hormone panel, the trend-of-the-month supplement — is precise and liberating: nature makes no mistakes and you are already perfect. Every output your body is producing is the correct output for the inputs it is receiving. The problem is never with the body. The problem is with the inputs. Change the inputs and the body — which has been designed by millions of years of successful evolution to produce health under the right conditions — will change the outputs without needing to be told how.
The five foundational practices he recommends for anyone, anywhere, regardless of how deep they want to go into the biophysics:
- Watch sunrise. Direct morning light into the eyes and on the skin — not through glass, not filtered — for the first available minutes of daylight. This is the trigger for the entire hormonal cascade of the day: beta-endorphin production, SCN clock-setting, appetite downregulation, dopamine sequencing. Nothing replaces it. Nothing substitutes for it. Watch the sunrise tomorrow and feel the difference in your body by noon.
- Eat within the first one to two hours of light exposure. First meal aligned with the circadian light signal, not arbitrary time. The body's digestive enzymes, stomach acid production, and metabolic readiness all follow the light clock. Eating in alignment with the light means eating with the biology rather than against it.
- Experience ten to fifteen minutes of solar noon with maximum skin exposure. The UV-B window — which only opens around solar noon at most latitudes — produces vitamin D, structures water in the skin via infrared, and delivers the broadband light signal that no artificial source can replicate. This is not sun worship. It is biology.
- Stop eating after sunset. The food cutoff is the light cutoff's partner. Both are required for leptin normalization, melatonin onset, and the full growth hormone and autophagy cascade during sleep. One without the other produces half the result.
- Blue blockers after sunset. If any artificial light is unavoidable after dark — screens, indoor lighting, evening obligations — blue-blocking glasses are the minimum mitigation. Nathan's Biospectral blue blockers are full-spectrum filtered, designed to allow the wavelengths that do not disrupt the circadian clock while blocking those that do. I will be wearing them. I am ordering them now.
Watch the Sunrise. Awaken What Has Always Been There.
Nathan's staying-dangerous-after-40 answer is the most complete definition of that phrase I have received in 110 episodes: resilience and robustness. Being able to endure heaps of sunlight. Being able to endure cold, heat, staying in a little longer each time. Being more clear in the mornings. Becoming your own leader. Not being attracted to any pharmaceutical, any supplement program, any external validation — because you have built the deep health inside your mitochondria, your water networks, your biophysical electron and proton spin states that makes you the source rather than the consumer.
His word for the audience was: watch the sunrise and buy some Biospectral blue blockers. He laughed when he said it, but he was not joking. Everything in this conversation flows from those two actions. The sunrise is the signal that tells the body what time it is, what hormones to produce, what to eat, when to sleep, how to recover. The blue blockers are the protection of that signal in the hours when the modern world is working hardest to jam it.
The greatest gift this conversation offers — and the one I want to name directly — is restoration of health sovereignty. Not dependence on a product, a practitioner, or a protocol. The conviction that your body already knows what it needs. It was built by nature to live in alignment with nature. When you return those inputs to it, the outputs are not remarkable. They are simply what was always supposed to happen. Nothing was missing. The signal was just being drowned out.
Nathan is coming back. We will go deeper into broadband light, the grounding infrastructure, the clinical recoveries, the EMF environment, and the biophysics of structured water. There is a full part two waiting, and I intend to give it its proper time. In the meantime: go watch the sunrise tomorrow. Feel what happens. That feeling is not something the modern world gave you. It is something it took away — and you just got it back.
The Glasses I Wear — Luca Nero Frames · biospectralsystems.com
I am a genuine fan of Biospectral Systems — I wear the Luca Nero frames and I love them. Every evening, without exception, from sunset until I am off screens. Nathan built Biospectral specifically for the ancestral light biology framework he has spent eleven years developing and testing with thousands of patients: full-spectrum filtered lenses engineered to block the wavelengths that disrupt your circadian clock and melatonin cascade while allowing the wavelengths that do not. Not a marketing product. A clinical tool that happens to look good. If you take one action from this episode — watch the sunrise, then order these. Use code JOSHBUTTON for 15% off at biospectralsystems.com.
Real Food as Real Light — The Ancestral Nutrition Standard
Nathan's framework makes clear that food is light in storage — the photonic information from seasonal, natural, ancestral sources is exactly what the gut needs to signal the liver, the brain, and the hormonal system correctly. Processed food is noise. Real food is signal. Lineage Provisions holds to the same standard: real ancestral-quality ingredients that align with what the body's light-sensitive biology is designed to receive. Use code JOSHBUTTON for 15% off at lineageprovisions.com.
Biospectral Blue Blockers · Full-Spectrum Light Bulbs · The Learning Hub
The Biospectral Systems website is the starting point: full-spectrum blue-blocking glasses designed specifically for the ancestral light biology framework Nathan teaches, full-spectrum incandescent light bulbs for indoor regenerative environments, and the Biospectral Learning Hub where the clinical evidence, patient stories, and deeper biophysics are documented for anyone who wants to go further. The glasses are what I am ordering immediately. Start there. Watch sunrise first. Buy the glasses second. Everything else will follow from those two actions.
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