Exposure to sunlight can help regulate the body's circadian rhythm, which is responsible for regulating sleep-wake cycles. When the skin is exposed to sunlight, it produces vitamin D, which is essential for the absorption of calcium and phosphorus - two minerals that are vital for strong bones. However, it's important to balance the benefits of sunlight with the risks of skin damage and skin cancer. Learn more about the benefits of sunlight for men's health and how to safely soak up some rays.
As a leading online TRT clinic, Best TRT provides personalized treatment plans, expert medical advice, and continuous support, all from the convenience of your home. This benefit is particularly important as you age, ensuring your bones remain healthy and robust. This "feel-good" hormone helps you stay calm and focused, reducing the risk of depression, especially during the darker months. Feel better both inside and out with our whole body approach to healing. This mechanism explains why we often feel happier and more energetic on sunny days.
The pituitary gland releases follicle-stimulating hormone (FHS) and luteinizing hormone (LH), the latter of which stimulates testosterone production in the testes. The p53 gene in keratinocyte skin cells can activate the pituitary gland and hypothalamus if the skin is exposed to ample sunlight (UV-B light in particular…). Over a month, men who got 20 to 30 minutes of sun exposure 2 to 3 times a week doing normal outdoor activities (gardening, reading, walking, etc.) had notably higher levels of testosterone. In the episode, Huberman cited a 2021 study exploring the effects of ultraviolet B (UVB) exposure—light from sunshine—on hormones. Avoid taking D3 late at night — morning is best to align with natural hormonal rhythms.
If you’re serious about raising testosterone, here’s what actually matters. You’re not optimizing testosterone via testicle tanning, and if anything you’re probably damaging them. Chronic UV exposure accelerates photoaging, including collagen breakdown, elastin degradation, and pigmentation changes.
Sunlight triggers a chain reaction that activates vitamin D more efficiently than most oral forms can. Researchers aren’t 100% sure yet, but vitamin D appears to interact with receptors in the testes, the same place testosterone is produced. Another controlled trial gave healthy men either a daily dose of 3,332 IU of vitamin D or a placebo for a full year. Specifically, UVB rays trigger a reaction that turns a cholesterol-like compound in your skin into vitamin D3 (cholecalciferol). When most people think of vitamin D, they picture bone health, milk commercials, or maybe those orange supplement bottles sitting in the bathroom cabinet.
Sunlight plays a key role in testosterone production, influencing everything from energy levels to muscle growth. Testosterone and vitamin D both tend to reach their highest blood levels when exposed to sunlight, likely as a result of sunlight's ability to synthesize these nutrients, as well as human body seasonality. Overexposure to sunlight can increase the risk of skin cancer and premature aging. While sunlight has many benefits for men's health, it's important to remember that too much exposure can also be harmful.
If you or someone you know needs urgent medical attention. Information provided on this website is not a substitute for medical advice Dr Tim Moss has PhD in physiology and more than 20 years’ experience as a biomedical research scientist.