Goji, goji berry, or wolfberry is the fruit of either Lycium barbarum or Lycium chinense, two closely related species of boxthorn in the nightshade family, Solanaceae. L. barbarum and L. chinense fruits are similar but can be distinguished by differences in taste and sugar content. Both species are native to Asia, and have been long used in traditional Asian cuisine. Since around 2000, goji berry and derived products became common in developed countries as health foods or alternative medicine remedies, extending from exaggerated and unproven claims about their health benefits.