I did some superficial research on some of the more popular and largely (except for the lysine (L) supplements and thought I’d put it on here.
I think most of this information is fairly accurate, but it’s pretty vague and I haven’t included any details or studies, though some of the material comes from study. Hope it helps!
Epimedium Sagitum Extract (horny goat weed) inc testosterone, inc libido, control cortisol production, inc energy, inc erection, inc blood flow
Hawthorn Berry - strengthen blood vessels, increase sensation and maintain erection longer
Maca - maybe nothing, aphrodesiac, sperm count inc.
Muira Pauma Extract, (Psychological charging, also relaxes corpus cavernosa, increased engorgement
Cayenne - rich in fatty acids, sexual development, balance hormone levels
Ginko Biloba - mental alertness, enhanced vitality levels, circulatory health and blood vessel health
Ginseng - muscle/sexual fitness, treatment of impotence, aphrodisiac
Tongkat Ali - aphrodisiac, inc testosterone, inc erection, inc energy. Inc estrogen/acne
CATUABA BARK EXTRACT - inc peripheral circulation/sexual function
Damiana - remedy for impotence, frigidity and prostate problems
TRIBULUS TERRESTRIS - libido, athletic ability, sperm and testicle size increase
L-dopa, dangerous, possible increase in size, sexual energy, general energy, aggressiveness.
L-Arginine , precursor synthesis of NO, improve blood pressure and HGH/insulin release.