Kuko no mi / gou qi zi / goji berry, wolfberry

Semi-dried raisin- or currant-size red berries of two evergreen solanaceae-family shrubs (Lycium barbatum, Lycium chinense). It adds a fruity, softly sweet and sour taste to various dishes.
Rich in antioxidants. As a Chinese medicinal cuisine ingredient, it is used for nourishing the liver and kidney and helping with languor, mental lethargy, dizziness, headache, declining vision and glycosuria (urine sugar).

Soft, large, pitted and bright color goji berries are higher quality than dried, small and dark red berries. Chinese grocery stores carry them, but Chinese medicine shops usually have higher quality berries and sell in small quantities (by weight).