Wild in the desert, Lycium barbarum is a pure natural green food without human intervention and pesticide and chemical fertilizer pollution. Black wolfberry is sweet in taste and flat in nature. It is rich in protein, wolfberry polysaccharides, amino acids, vitamins, minerals, trace elements and other nutrients. It is also rich in melanin - natural proanthocyanidins (not contained in red Lycium barbarum). Its content is more than 20 times that of blueberries, which is the natural wild plant with the highest anthocyanin content so far. Therefore, it is called the "king of anthocyanins". Procyanidins are the most effective natural water-soluble free radical scavengers. Their efficacy is 20 times that of VC and 50 times that of VE. Black wolfberry is known as the wild "blue witch". Black wolfberry is more precious and has more medicinal value than general red wolfberry.