Fadogia agrestis
A Nigerian shrub used in traditional medicine as an aphrodisiac and treatment for erectile dysfunction. An extract of the stems was found to increase serum testosterone and sexual activity in rats, although it caused adverse testicular effects at high doses. Fadogia agrestis is being added to various “male” enhancement products and T-boosters, although there is no data on its efficacy in humans.
11-Hydroxy-Yohimbine
A metabolite of yohimbine also used in fat loss supplements, as it has a longer half-life (6 – 8 hours vs. 1 – 2 hours) than yohimbine itself.
Rauwolscine HCl
Also known as alpha-yohimbine. An isomer of yohimbine alleged to have fewer adverse effects.
Yohimbe
The bark of Pausinystalia yohimbe, a tree indigenous to Western Africa. The active ingredient in yohimbe is the alkaloid yohimbine. Yohimbe bark extracts are often added to fat loss supplements and/or “male” enhancement supplements, although the amount of yohimbine is variable, and often low.
