Andrew Huberman· PhD
In addition, finasteride treatment done properly, which we'll define in a moment, can reduce hair loss in 90% of all people that take it. That is near staggering. ... In addition, it's known to increase hair thickness by about 20- 30% overall, so not just create new growth of hairs, and thicker hairs, but whatever hair you do happen to have on your head, it can further thicken those.