Arbutin, also known as ursolic acid, the chemical formula for C12H16O7, is a kind of ericaceae plant extract, bearberry leaves can inhibit the activity of tyrosinase in the body, prevent the formation of melanin, thus reducing the skin pigment deposition, remove spots and freckles, as well as the effect of sterilization, anti-inflammatory, mainly used in cosmetics. It is found in the whole grass of the genus tigerium, the leaves of the rhododendron and many other plants. It can also be chemically synthesized. The bear fruit leaves were crushed and rinsed, then boiled with water, and extracted twice. The water extract was combined and condensed to syrupy shape under reduced pressure. Then methanol was added to dissolve it, and the insoluble methanol was filtered out. If in the water with activated carbon decolorization, filtration, recrystallization, arbutin pure product. Arbutin is mainly extracted from Bearberry leaves. Arbutin can also be found in some fruits and other plants. It has the effect of brighting the skin, can quickly penetrate into the skin without affecting skin cells, and combines with tyramine acid, which causes the production of melanin. It can effectively block the activity of tyrosinase and the generation of melanin, and accelerate the decomposition and elimination of melanin. Arbutin also protects the skin from free radicals and is hydrophilic, so it is often added to commercially available whitening products, especially in Asian countries.