I take a two multi vitamins, one biotin, two milk thistle, and 4 fish oil caps daily. Seems overkill but I've been losing my hair very slowly over the past two years(I'm 26), though it's still not noticeable to anyone else, the thought of being bald at 30 is just depressing.
I will vouch for this combo, along with rogaine, it has put a complete stop to my hair loss, haven't seen any regrowth, but I wouldn't even notice it anyways as the naked eye wouldn't even know that anything is missing.
Was going to make a thread about this to help other people here suffering the same problem, but didn't want to seem like I was whoring for attention.