Arizona's Finest, In a word: nothing. My hair began falling out when I was 16 (I am 41 now). While I was fortunate that I didn't lose too much hair,I certainly empathise with your friend. I considered using Rogaine when it was still available byÂ prescription only,but heard that only about 30% of men sustain any kind of significant growth. And the fact that one must continue to use it for the rest of one's life,or the growth will simply fall out again?. Â Why waste all of that $$? Likewise with Propecia,the prescription only tablet that purports to grow hair. No thanks. Off and on,I get curious about hair transplantation surgery,but I suspect that it costs much more than I'm willing to spend. I've learned to adjust to my thinning hair,and,while I'd like to have a mane like George Clooney or Pierce Brosnan, I've accepted that I don't. Â Depending on the extent of your college friend's hair loss,and how much he's been affected by it,he's probably better off getting the transplant,if he truly wants to regain a full head of hair.