Kava was first discovered by explorer Capt James Cook, who gave this plant the botanical name of "intoxicating pepper." The root of this plant is made into a popular beverage in Polynesia called Sakau. Herbalists here have traditionally used it as a remedy for nervousness and insomnia. It can also help relieve cramping due to muscle spasms. Possible benefits might help you get a good night sleep, promotes relaxation and may help reduce water retention. From the "herb bible by Earl Mindell. Long term use may cause liver damage. Matrix kava root is of the highest quality. 20 capsules in a pack. Each capsules is approximately 500mg.