as long as you know what your doing, all hormones are safe. checking your levels and using cycles with proper PCT. as opposed to the "pill-pop-N-pray" method. in anycase there is some stuff out there, nothin like PH's or steroid's. well anyway this is'nt in any particular order: ZMA, tribulus, DHEA, 6-OXO (if it's around still), Saw Palmetto, Tongkat Ali, Chrysin to replace 6-oxo, and the combo's Avena Sativa extract, Mulra puoma extract, Urtica Dioica extract. Well some I would read up on it if you intend to take it. all this stuff is not that effective anyway, eating lots, resting lots, and working out well, will see the fastest results.