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Anything that stresses the body, like heat or cold exposure, can be beneficial. Cold exposure, such as cryotherapy, builds brown fat, which was only discovered in humans about five years ago. Brown fat is healthy because it contains many mitochondria and may secrete proteins that promote overall health. One approach involves spending about fifteen minutes at 150 degrees Fahrenheit, followed by time in a steam room, then a hot tub. The routine concludes with dunking a couple of times in water that's less than four degrees Celsius. This entire process is done for about an hour on Sundays.

A 1986 paper studied the effects of sauna use on growth hormone levels. Male and female subjects were exposed to an 80 degree Celsius (176 degrees Fahrenheit) environment for 30 minutes, four times per day, totaling two hours daily. The study found that subjects undergoing this protocol experienced a 16-fold increase in growth hormone. This effect was statistically significant.

Anything that stresses the body and puts it into a state of shock is good in the long run. Perceived adversity, like being too hot or too cold, is beneficial, especially the gradient between the two. Cryotherapy, or cold exposure, builds up brown fat. Brown fat wasn't known to exist in humans until about five years ago. It's typically across your back and in other regions. Brown fat is healthy because it has a lot of mitochondria, and it secretes proteins that tell the rest of the body to be healthy. The speaker subjects themself to an hour of hot/cold exposure on Sundays. This includes fifteen minutes at 150 degrees Fahrenheit, time in a steam room, and then a hot tub. The speaker then dunks themself a couple of times in water that's less than four degrees Celsius.

Red light therapy, or photobiomodulation, is described as the body responding to light it is biologically designed to respond to, especially red light and near-infrared light. Jonathan Otto explains that the technology has historical roots, with Nobel Prize context in 1903 for light therapy (Niels Ryberg Finsen) and early work by John Harvey Kellogg; red light therapy as known today was advanced by Andre Mester in the 1960s and further developed with LED technology funded by NASA, enabling high power delivery with minimal heat. Key evidence and claims: - In major clinical studies, red light therapy is being explored as an alternative or adjunct to palliative chemotherapy, radiotherapy, and surgery in cancer. The Lancet Oncology published a trial with 413 men in which the red light group did almost 400% better than the non-red-light group; only 6% in the red light group required surgery versus 30% in the non-red light group, a claimed 500% difference in that aspect. - In a lymphoma pilot study (PubMed, 2006), three patients achieved complete remission within a week after photodynamic therapy with methylene blue, with no side effects reported and pain easily managed. - University College London conducted studies showing 49% remission in a red-light group versus 13.5% in a non-red-light group in a prostate cancer context when combined with a photosensitizer; separate eyesight research with 6, seven 0-nanometer parameters demonstrated immediate improvements, with larger long-term effects reported in various other conditions. - Red light therapy is claimed to impact a broad range of conditions: eyes (macular health, myopia in children), autoimmune diseases (Hashimoto’s thyroiditis, autoimmune thyroiditis), hair loss (androgenic alopecia), skin conditions (acne, eczema, psoriasis), chronic pain (arthritis, back pain), depression and anxiety (rapid improvements noted within hours in some studies), and post-stroke or neurodegenerative conditions (mood, cognitive function, overall energy). - Specific eye-related findings include a large trial where 41 clinical trials in children showed the therapy stopped vision worsening in many cases; in the UCL eyesight study, 70–80% near-infrared penetration targets deeper tissues, with evidence of rapid improvements in vision when light was delivered in the morning or near the eyes at 670 nm in LED form. - In thyroid and metabolic contexts, there are reports of thyroid medication reduction and remission in chronic autoimmune thyroiditis with certain dosing regimens (e.g., 20 minutes twice a week for five weeks in a trial cited), and a Hashimoto’s thyroiditis study showing substantial medication reduction. - Hair growth is reported to respond to red light therapy due to stimulation of hair follicles and scalp stem cells; anecdotal reports include improved hair density and delayed graying in some individuals. - The therapy is claimed to affect fat loss via photonic lipolysis and to modulate mitochondrial function, with mitochondrial chromophores described as light receptors in about 25% of cellular organ content, generating reactive oxygen species and ATP to drive cellular energy. - A long-COVID study by the European Society of Medicine reported four sessions of 64–84 minutes each yielding total remission of all symptoms in 60 of 62 participants within one week; two others improved with the same protocol. - Dosing guidance and safety: thousands to millions treated with red light therapy have reported minimal adverse effects; overexposure can occur, but the majority of clinical experience indicates a favorable safety profile; a dark period and sleep in darkness are noted as important to maximize benefits. - Delivery devices: panels that deliver broad-spectrum light (including multiple wavelengths such as 630 nm, 660 nm, 670 nm, 810–860 nm, 1060 nm) are preferred for broad organ coverage and deeper tissue penetration; these devices aim to deliver high irradiance (e.g., over 200 milliwatts per square centimeter at about three inches) to accelerate healing and support whole-body photobiomodulation. - Practical use: exposure parameters vary by condition, with some studies showing immediate or rapid improvements (e.g., eyesight within 24 hours in some trials; depression or anxiety improvements within hours; autoimmune symptoms over weeks), while others report improvements sustained for months if therapy is continued, though some benefits persist beyond cessation in certain conditions. Historical and practical context: - The interview frames red light therapy as a natural, noninvasive modality that aligns with the body’s use of light for healing, contrasts it with more invasive conventional therapies, and positions it as having broad clinical study support across multiple journals (including The Lancet Oncology, British Medical Journal, and other major journals). It’s presented as a scientifically backed, broadly applicable therapy that can be used at home with high-quality devices. Applications mentioned: - Cancer and tumor-targeted approaches (photodynamic therapy), eyes and vision, autoimmune thyroid disease, skin conditions, hair growth, wound and tissue healing, pain and inflammation, mood disorders, long COVID, and metabolic effects such as fat reduction and thyroid regulation.

One treatment showed positive results that sham control did not achieve. Multiple sessions had an even more robust effect. Traditional saunas, hotter saunas at 175-180 degrees for twenty minutes, are associated with benefits. Using a traditional sauna four to seven times a week is associated with a fifty percent lower cardiovascular related mortality versus using a sauna one time a week.

Cold water exposure, short of inducing hypothermia, can increase metabolism and body heat. Brief exposure, such as a cold shower or ice bath, triggers adrenaline, cortisol, and dopamine release. A study in the European Journal of Physiology showed a 2.5x increase in dopamine from cold water exposure, lasting a long time. This increase is comparable to that triggered by cocaine, but without the sharp peak and subsequent crash. Cold water exposure for one to three minutes can increase body temperature and is used by some to wake up in the morning.

Stressing the body, whether through cold or heat, lowers inflammation. The initial exposure starts a hormetic stress process, strengthening cells and activating the immune system. This shock increases white blood cell count and stress hormones, which in turn boosts metabolism, further reducing inflammation and stress levels. Consistent practice leads to lower blood pressure and heart rate. These measurements serve as indicators of cardiovascular and lifestyle disease risk.

There is nothing that comes close to cold water immersion in terms of stripping fat off of your body. Activating brown fat, this special type of fat in the human body that turns on our thermostat to restore our natural body temperature is one of the best ways to burn fat in the body. So you're going get a cold shock protein release. You're going to get an elevated mood and elevated emotional state. You're going to get the activation of brown fat, and you're going to get this beautiful peripheral vasospasm forcing all this healthy blood into our core and up to our head.

Evening heat exposure may increase growth hormone release by 16 times initially, but subsequent sessions have minimal impact. Cold exposure is beneficial anytime for resilience. Post-cold exposure, the body heats up, which can be stimulating, so it's best to do it earlier in the day if sleep is a concern. Heat exposure involves temperatures between 187°F and 212°F. For cold exposure, aim for a temperature where you want to get out, but can stay in safely. The minimum threshold is eleven minutes of uncomfortable but safe cold exposure per week and fifty-seven minutes of heat exposure per week.

Saunas can significantly improve health, and research in the book will blow your mind. Using a sauna four days a week for 20 minutes at 160 degrees plus, whether laser or traditional, can change your health. Sauna use reduces the chance of a heart attack by over 51% and the chance of a stroke by 62%. People who wouldn't work out can start with sauna use, and after about a month, they often want to start working out. Saunas are quick little hacks that can make it happen.

It has some pretty cool effects on lowering your blood pressure. It can decrease the intensity and the risk of getting an asthmatic event. It can actually strengthen your immune system so you don't get sick as often. They have found that it decreases all cause mortality in one study by forty percent if you're doing a sauna four to seven days a week. Sauna therapy can actually help reduce pain, inflammation. It can actually help certain skin problems like psoriasis. Sonotherapy can give you significant cognitive benefits, which is really cool. It can actually decrease the severity of dementia, too. Another cool benefit that relates to a lot of other side benefits is it can increase insulin sensitivity, so it actually is helping you with your blood sugars.

Sun exposure improves blood flow. For nitric oxide production and heat shock proteins, use a dry Finnish sauna at 175 degrees for 15-20 minutes. The recommendation is for natural heat instead of infrared. The speaker is concerned that infrared is too deeply penetrating, and we don't have protection from it. We evolved to get infrared from the sun, which has shorter wavelengths.

People who exercise and use a sauna have a higher VO2 max than those who only exercise, as sauna use mimics moderate cardiovascular exercise. Studies from Finland indicate a dose-dependent effect between sauna use and all-cause mortality, cardiovascular mortality rate, dementia, and Alzheimer's disease. All-cause mortality is reportedly 40% lower in people using a sauna four to seven times a week, compared to 24% lower for those using it two to three times a week. The average sauna temperature in the Finnish studies was about 174 degrees Fahrenheit. Staying in the sauna for at least 20 minutes is necessary to achieve a robust effect. The suggested protocol for optimal cardiovascular, brain, and all-cause mortality benefits is 20 minutes at 174 degrees Fahrenheit, four times a week.

Using the sauna for 20 minutes, at around 174 degrees Fahrenheit with 10 to 22% humidity, can reduce the risk of cardiovascular disease-related death by 50%. However, sitting in the sauna for only 11 minutes on average results in an 8% reduction in cardiovascular disease-related death. So, the duration of sauna use definitely plays a significant role in its health benefits.