I've tried vitamin A & betaine, both didn't do anything for me... though I don't think it'll hurt to use it or keep trying if you notice anything ... just always triple check because sometimes things like Vitamin E, berberine & B2 have anti androgenic qualities while B1 is pro DHT... so just always search
unfortunately, in my opinion, only things that you're deficient in, either as a result of FIN or general diet, can help in high dosages... so things like choline & iodine, which we don't get from diet enough and are hampered as a result of fin, are products I recommend... vitamin D3 being kinda the exception to this statement, though I use 10k iu a day. That's actually a hormone more than a vitamin...
Obviously, this excludes Pharma stuff like anavar, letrozole or testosterone , which is not in the same category of OTC vitamins & such...
There are some herbs I like, like trib... which don't come from diet anyhow.
I like supplemental L-Carnitine, Alpha Lipoic Acid, L-tyrosine, choline, tribulus & tongkat... though I can't say I take all this regularly...
@ncsugrad