One compound which has been finding a terrific deal of attention nowadays by the mass media and both scientists is Resveratrol (Res), which is a phytoestrogen along with antioxidant produced from grapes. It's a combination that has been determined to act as an anti estrogen, Inhibits aromatase (the enzyme which converts testosterone to estrogens) at excessive doses, might have effects on fat loss, as well as has numerous potential health related benefits.
Up to now, the stuff appears to a wonder compound. Last but not least, recent studies as well suggest it may increase testosterone levels, and that's got bodybuilders along with other pro athletes, and also nutritional supplement companies, excited as one may assume.
One recent study being a great deal of attention entitled "trans Resveratrol relaxes the corpus cavernosum ex vivo and improves testosterone levels and sperm quality in vivo" found positive effects on testosterone booster capsules - click to find out more, levels in rabbits. This study found that rats given Res orally at fifty mg/ kg for twenty eight days concluded
"... resveratrol has a positive effect on male reproductive feature by triggering a penile erection , as well as enhancing blood testosterone levels, testicular sperm counts, and epididymal sperm motility." (1)
Two essential details to remember: the research was carried out in rabbits and at quite high doses. to be able to find the dose utilized in the research as it applies to you, that had been fifty mg/ kg, use the weight of yours in lbs divided by 2.2 X 50 = dose necessary according to this study...However, another study carried out in animals utilized a dosage: twenty mg/(kg d) also had positive effects on testosterone, so that might be best starting dose. It's not identified of course in case this's the human equivalent dose (HED) or even exactly what the HED is at this time frame to effect testosterone in humans and even though it will!
Unfortunately, no conclusive human studies are available at this moment, so the "optimal" dose is a WAG at the moment. However, anecdotal reports of people using 500mg - 1000mg report positive effects, but it is far from obvious what effects people are able to expect from these doses of Res, but considering all the other possible health benefits of Res, it might be well worth trying.
Shin S, Kim JC, Nahm SS, Joo SS, Choi BH, Choi JH, Jang MJ, Park D, Jeon JH, Kim YB. Arch Pharm Res. 2008 Jan;31(1):83-7