From the Manufacturer:
American Ginseng, discovered in the early eighteenth century, has been valued throughout the world by traditional health care practitioners. Nature's Plus Herbal Actives American Ginseng root extract is uniformly standardized to a minimum of 5% (12.5 mg) ginsenosides to guarantee that each and every capsule provides consistent potency and activity. Each capsule, providing the greatest concentration of active botanical principles, maximizes the synergistic benefits of the whole root, which naturally contains more than twenty saponin triterpenoid glycosides in a potent Rb1/Rg1 profile.