David Herrera
Health and longevity commentator and guest expert who discusses sunlight biology, DHA, and the effects of sunscreen and seed oils on skin adaptation and photoaging.
Best podcasts with David Herrera
Ranked by the Snipd community
30 snips
Jan 23, 2026 • 19min
Why Bryan Johnson is Wrong About the Sun
David Herrera, health and longevity commentator who studies sunlight biology, explains why avoiding the sun can backfire. He covers how chronic sunscreen use weakens skin, the protective role of DHA in membranes, and how seed oils and linoleic acid increase burn risk. He also recommends gradual morning sun to build tolerance and improving omega-3 levels for solar resilience.
20 snips
Jan 21, 2026 • 11min
The Vitamin D Lie: Why Supplements Don’t Work Like Sunlight
David Herrera, a health and physiology commentator specializing in sunlight and circadian biology, reveals the hidden dangers of sun avoidance. He explains why sunscreen use in low UV conditions can be counterproductive and discusses the intricate ways that UV light affects hormone production beyond just vitamin D. Herrera argues that oral vitamin D supplements fail to replicate the benefits of sunlight, often masking underlying health issues. He also contrasts dietary and supplemental vitamin D, emphasizing the importance of natural sources.
