Goji berry is a Chinese medicine with kidney tonic effect, which can be used for various liver and kidney yin deficiency (deficiency of yin fluid in liver and kidney) conditions. Lycium barbarum is the dried mature fruit of Ningxia wolfberry, family Solanaceae, with sweet and flat medicinal properties, belonging to the liver and kidney meridians, long for nourishing kidney essence and tonifying liver and blood, as a flat tonic for kidney essence, liver and blood. Clinically, it is often applied to the waist and knee pain, impotence and spermatorrhea, internal heat, fatigue, thirst, blood deficiency, yellowish blood, and unclear vision caused by deficiency of liver and kidney yin, essence and blood. Chinese wolfberry is often used together with other herbs that tonify the liver and kidney, such as hyssop, cuscuta, he shou wu, ripened dihuang, chrysanthemum, and so on, to form a variety of classic kidney tonic formulas, such as wolfberry, chrysanthemum, and dihuang pills. Chinese wolfberry is suitable for people with kidney yin deficiency, while people with yang deficiency who are afraid of cold should use it in conjunction with yang tonic medicines. If medication is needed, please do so under the guidance of a physician.