Dr. David Sinclair takes a hormone mimetic to stop DHT, a form of testosterone that leads to men-related hair loss.

“While Dr. David Sinclair has publicly discussed hair loss treatments, including DHT blockers like finasteride, there is no reliable evidence that he personally takes them. Multiple detailed lists of his supplement and medication regimen have been published in various articles and interviews, and none include finasteride or any other specific DHT blocker. One YouTube video title claims he uses it, but this is an uncorroborated, second-hand assertion. Furthermore, finasteride is a 5-alpha-reductase inhibitor, not a "hormone mimetic," making the description of the drug's class inaccurate. Context: Dr. Sinclair is a longevity researcher who openly shares his personal supplement regimen. He has discussed the science of hair loss and the mechanisms of treatments like finasteride, which inhibits the conversion of testosterone to Dihydrotestosterone (DHT), but this is distinct from stating he uses the treatment himself.”