I found this great website that provides information on many popular herbs for menopause, www.herbs-for-menopause.com but I only tried the one that they recommended and it worked great! i was having heavy hot flashes and couldn't sleep at night, so I tried MacaFem and i started to feel so great! they also have a web page you can check to find more information www.macafem.com I hope I help somebody because it helped me soooo much, that I am really appreciate