Black ginger extract, Kaempferia Parviflora (not to be confused with black turmeric) is a medicinal root from Thailand (aka Krachai Dum in Thai), which is traditionally used as an aphrodisiac, male sexual tonic, energy enhancer and longevity agent. It is also famous among Muay Thai fighters as Thai Ginseng.
Certain plants contain phytoestrogens — natural compounds that have an inhibitory effect on estrogen. As a result, estrogen levels in the bloodstream decline, allowing testosterone to be more prominent. With the rise in testosterone come changes in the body, such as improved metabolism. The best matcha green tea powder can help promote these effects.