Melatonin
Hormone signaling light exposure; endogenous production varies with seasons; supplements are often supra-physiological and require caution, especially during pregnancy.
Research
Expert discussions of Melatonin across 52 podcasts.
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Common Themes
Videos Mentioning Melatonin

Dr. Arthur De Vany Interview | The Tim Ferriss Show (Podcast)
Tim Ferriss
A supplement taken by Art De Vany for its protective and stress-resistant properties, not just as a sleep aid, often at higher doses (5-10mg).

Human Biology is About to Change Forever - Bryan Johnson (4K)
Chris Williamson
Discussed in relation to proper dosing for sleep, with Bryan Johnson taking a very small amount (300 mcg) to offset pineal gland calcification, contrasting with common large doses.

How Women Can Improve Their Fertility & Hormone Health | Dr. Natalie Crawford
Andrew Huberman
A hormone supplemented at low doses (1-3mg) before bed can improve fertility outcomes and egg quality, especially in cases of chronic inflammation.

Andrew Huberman: Peptides, Sleep Tech, and the End of Obesity
a16z
A hormone that regulates sleep-wake cycles, often used as a supplement for sleep.