What Is Goji? The goji berry is the fruit of the lycium barbarum plant. Goji has been used for over 2,000 years as part of traditional chinese medicine. Legends of hoe effective goji is about in chinese literature. In recent years, goji was introduced to the rest of the world in the form of goji juice, and scient... Similar Editorial : Goji juice by Caren Jacobs. | Source : Tomato Gardening