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.
Turmeric is the rhizome of Curcuma longa, a plant that belongs to the ginger family. It is mostly used in South Asian countries but it is getting more popular on the Western side of the world especially when it comes to increasing testosterone level. For more information about these turmeric testosterone connections, take time to read this article.