In a move that could well be seen as a major break-through, especially for weight lifting athletes, tongkat ali has now been patented in the US for the inhibition of human aromatase enzyme, as well as increasing increasing or activating the total levels of testosterone, free testosterone, and/or luteinizing hormone , while decreasing the levels of estrogen and estradiol.

The full patent can be read here:

http://www.google.com.my/patents?hl=en&lr=&vid=USPATAPP11361799&id=62GYAAAAEBAJ&oi =fnd&dq=eurycoma+longifolia+muscle+testosterone

A printscreen can by read here:

Tongkat ali now patented for testosterone control