Dihydromyricetin is extracted from vine tea.Vine tea is one of a rare plant. Botanical name is ampelopsis grossedentata, it is one kind of typical tea plant, “Chinese Herbal Medicine Collection” wrote that the vine tea (Teng Cha )has a glycol flavor, the nature is cool; it can alleviate fevers, dis-intoxicate, cure rheumatism, strengthen physique, and many other functions Long–term drinking could be effective to skin disease.