Androstenedione
Supplement
A precursor hormone to testosterone produced in high levels in female hyenas, causing enlargement of their genitalia.
Mentioned in 3 videos
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Videos Mentioning Androstenedione

#44 – Jeremy Schaap, ESPN journalist: upsets, doping, triumphs, and the importance of sports
Peter Attia MD
A supplement found in Mark McGwire's locker during his home run chase, which was legal at the time but raised questions about doping and led to public acceptance of his denials.

How Hormones Shape Sexual Development | Huberman Lab Essentials
Andrew Huberman
A precursor hormone to testosterone produced in high levels in female hyenas, causing enlargement of their genitalia.

Patrick Arnold Interview (Full Episode) | The Tim Ferriss Show (Podcast)
Tim Ferriss
A prohormone introduced by Patrick Arnold, gained media attention with Mark McGuire. It converts to testosterone but also aromatizes into estrogen.