First, Horny Goat Weed, or Epimedium (active ingredient: Icariin) has been long hailed as an aphrodisiac with purported beneficial effects on testosterone. Problem is, a recent study shows it enhances Aromatase:
http://www.ncbi.nlm....pubmed/23261485
Resveratrol, often cited as an anti-aging chemical, that has also been found to have some beneficial effect on male fertility, partially through blockade of the Aromatase enzyme. Problem is, it also seems to have a directly negative impact on Testosterone itself:
http://www.ncbi.nlm....pubmed/24472608
Cistanche, another herb long praised by the Chinese. They recently found a toxic effect on the testes, though may be linked to higher doses?:
http://www.ncbi.nlm....pubmed/22002114
Fenugreek, this is something a lot of people are already familiar with, but it's effects on raising Testosterone are simply the result of blocking the conversion to DHT. This obviously won't be a problem if you are having issues with the prostate or baldness:
http://digitalcommon...b/vol2/iss1/13/
Calcium-D-Glucarate - from what I've read, seems beneficial as an estrogen blocker. But it does this effectively through a detoxification process ''glucoronidation''. Problem is this may affect other steroid hormones as well.
If there are any others you can find, feel free to point them out. Also, if you can shoot any holes in the references above, I would love to hear them.
Peace out.
Edited by agwoodliffe, 11 November 2014 - 10:23 PM.