Dr. Alexis Cowan on Sunburns, Diet, and Light Exposure

Diet and Sunburn Susceptibility

• 💡 The omega-6 to omega-3 ratio significantly impacts inflammation and skin's susceptibility to burning.
• ⚠️ Modern diets are overdosing on omega-6s, primarily from processed foods using industrial seed oils, leading to fragile, oxidized fats in skin cell membranes.
• 🐟 Conversely, omega-3s, especially EPA and DHA from animal-based sources like fatty fish and shellfish, are crucial for anti-inflammatory support.
• 🥑 Plant-based ALA omega-3s have poor conversion rates to EPA and DHA, making animal sources more bioavailable.

Timing of Meals and Circadian Rhythms

• ⏰ Eating late at night can disrupt gut clocks, signaling daytime to the body and impairing the skin's ability to mount a proper melanination response.
• ☀️ A circadian eating pattern, with a larger breakfast and smaller dinner, supports fat burning overnight and optimizes cellular processes upon sunrise.
• 📉 Stable glycemic levels are imperative for maintaining a lower inflammatory state, thus reducing sunburn risk.

Light Exposure and Melanin Production

• 👁️ UV light entering the eyes stimulates the production of MSH hormones (alpha, beta, gamma), which signal melanocytes to create melanin.
• 🕶️ Blocking UV light with sunglasses can hinder this coordinated response, potentially increasing susceptibility to burning.
• 🔬 The sun's benefits, including protection against cardiovascular disease, diabetes, and certain cancers, often outweigh the risks of skin cancer, especially when considering a "solar callus."
• 👩🏾‍🦱 Melanin's role may be to harness UV light's energy productively, a concept termed "human photosynthesis," rather than solely for protection.

Environmental Factors and Mitochondrial Health

• 🔵 Blue light exposure directly impairs mitochondrial function, which is essential for melanin production.
• ⚡ Non-native EMFs also negatively impact mitochondrial function on skin and eye surfaces, hindering the melanination response to UVB light.
• 🧬 UV light exposure triggers the release of pro-hormones like POMC, which breaks down into beta-endorphins, natural opioids produced by the body.