Summary
Dr. Roger Seheult, a board-certified critical care and pulmonary physician, joins Steven Bartlett to discuss his "NEWSTART" framework of eight health pillars -- nutrition, exercise, water, sunlight, temperance, air, rest, and trust. The conversation focuses heavily on sunlight and its far-reaching effects beyond vitamin D production, particularly how infrared light penetrates up to 8 centimeters into the body and directly stimulates mitochondrial function. Seheult explains a paradigm-shifting 2019 paper by Russell Ryder and Scott Zimmerman showing that infrared radiation from the sun upregulates melatonin production within mitochondria, serving as a powerful antioxidant cooling system that prevents oxidative stress. This mechanism connects to diseases like dementia, diabetes, cardiovascular disease, and kidney disease -- all rooted in mitochondrial dysfunction. He shares compelling anecdotes from his ICU experience, including a 15-year-old cancer patient given two days to live whose infection cleared dramatically after being taken outside, and a COVID patient whose oxygen requirements dropped from 35 liters to zero in five days after daily sun exposure. The episode covers SAD lamps for circadian rhythm regulation (10,000 lux, 20 minutes in the morning), the importance of darkness at night for melatonin production, vitamin D supplementation (2,000 IU daily reduces autoimmune risk), and how red light therapy devices can improve mitochondrial efficiency. Seheult argues that lack of sunlight is "the scurvy of the 21st century," noting Americans spend 93% of their time indoors and that mortality across all diseases peaks in winter months globally.
Key Points
- Infrared light from the sun penetrates up to 8 cm into the body and stimulates mitochondrial melatonin production, a powerful antioxidant that prevents oxidative stress
- Mitochondrial dysfunction is the common root of dementia, diabetes, cardiovascular disease, and kidney disease -- and mitochondrial output drops roughly 70% as we age
- Vitamin D levels during COVID predicted outcomes, but supplementing vitamin D alone did not help -- suggesting sunlight's benefits go far beyond vitamin D
- A Brazilian RCT using infrared light jackets on COVID patients showed statistically significant improvements and reduced hospital stays from 12 to 8 days
- SAD lamps (10,000 lux) used for about 20 minutes in the morning help set circadian rhythm and reduce depression, especially at high latitudes
- Red light therapy at 670 nanometers has been shown in RCTs to improve mitochondrial efficiency, eyesight, and blood sugar regulation in as little as 15 minutes
- Darkness at night is equally important -- screen light suppresses pineal melatonin and shifts circadian rhythm, leading to delayed sleep onset
- A 20-year Swedish study of 30,000 women showed those with the most sun exposure had mortality equal to non-smokers, while sun-avoiders had mortality comparable to smokers
Key Moments
Sunlight is far more than just vitamin D
Dr. Roger Seheult explains that a major misconception is equating sunlight with vitamin D alone, arguing that sunlight has far more benefits than supplementation can provide and that taking a vitamin D pill is not a replacement for sun exposure.
"A very big misconception that people have is that sunlight equals vitamin D. And therefore, if you take a vitamin D supplement, you don't need to go in the sun. This is really something that's now being debunked. Sunlight has far more benefits than just vitamin D."
A dying boy's recovery after being taken outside into sunlight
Dr. Seheult tells the story of a 15-year-old cancer patient with a flesh-eating lung infection who was given two days to live. His only wish was to go outside. After five days in sunlight (plus a light therapy device), his infection was 60-70% gone.
"What do you want to do with your life in the next two days? What do you want to do? And surprisingly, he says, I want to go outside."
Hospital patients near windows recover faster
Dr. Seheult describes how studies show that hospital patients in beds closer to windows get discharged faster, and hospitals with bigger windows get better patient satisfaction surveys, advocating for getting patients outside as part of treatment.
"People in a two-bed room, if you're the bed closer to the window, you get discharged from the hospital faster on average."
Infrared light from sunlight powers mitochondria and fights disease
The episode explains how infrared light from the sun penetrates up to 8 centimeters into the body and interacts with mitochondria, stimulating melatonin production at the cellular level that acts as a powerful antioxidant against disease.
"Go to the Grand Canyon and there's a thunderstorm at the other end of it. What do you hear? It's like a rumbling. And then as it gets closer, you hear the This is a fundamental physics principle. And so, when the sun is shining, there's very short wavelengths, ultraviolet B, involved in vitamin D. But at the other end, there's this infrared light, which we'll talk about, or red light. It's very long wavelengths, and it can penetrate very, very deeply. That's very important because what we're talking about is the human body. And if the sun is going to have an effect on the human body, it's got to be more than just the skin. So that's exactly what this paper showed: is that basically infrared light from the sun is able to penetrate probably up to about eight centimeters, according to Scott Zimmerman in this article. And it fundamentally interacts with specifically the mitochondria. And what does it do to the mitochondria? So let's back up and talk about the mitochondria because this is central. The mitochondria to the cell is like the engine in your car. The engine produces locomotion that causes the wheels to spin, but in the process of doing it, it causes heat to surround the engine. And if you don't deal with that heat, it will shut down the engine. It will make it more inefficient, and eventually it will shut it down. So what do all internal combustion engines have? They have a cooling system. They have a radiator. They have an oil pan. They have a water pump. And that's exactly what the cell has to have for the mitochondria. It's not heat."
