Mark Bell's Power Project The Sun Isn’t the Enemy: How Light Controls Dopamine, Hormones, and Health
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Jan 26, 2026 David Herrera, a powerlifter-turned-biohacking educator who founded Solar Athlete, explains how sunlight, light spectrum, and environmental inputs shape hormones and dopamine. He contrasts sun vs narrow red light, explains morning light for kids, UVA/UVB roles, and how cold, red/infrared, and light timing interact. Practical hacks include sun breaks, windows, and combining cold with outdoor movement.
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Why Screens Feel Addictive
- Blue light alone degrades melanin in the retina and converts melanin to dopamine, producing an artificial wakefulness and screen 'addiction.'
- This depletes internal melanin reserves and promotes dopamine‑seeking behaviors.
Kids Get Less Outdoor Time Than Prisoners
- David Herrera notes that some states give prisoners more outdoor time than schoolchildren, which he finds alarming.
- He connects limited childhood sun exposure to rising ADHD, depression, and poor sleep in kids.
Supplements Don't Replace Sunlight Signaling
- Oral vitamin D supplements don't replicate sunlight's mitochondrial signaling because the vitamin D receptor sits on the mitochondrial membrane.
- Supplementing D without sunlight can raise LDL and suppress DHEA or pregnenolone pathways.