"Kava Kava root, discovered by the explorer Captain James Cook, is a made into a healthful beverage in Polynesia. Nature's Plus Herbal Actives Kava Kava root extract is uniformly standardized to a minimum of 29-31% 72.5-77.5 mg kavalactones 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 fifteen lactones. "