Cautions:1 Arbutin is easy to decompose in acidic environment, pay attention to the pH of cream emulsion system controlled at 6-7.2 After dissolving arbutin in a small amount of water at 50℃, mix it with other cosmetics.3 Add proper amount of vitamin E in the formula (usually 1%~3%) to stabilize it. Add appropriate amount of sodium metabisulfite Na2S2O3 (recommended addition amount is 0.1%-0.2%) and other antioxidants can prevent the paste from discoloring.4 Adding natural vegetable oils such as oleic acid and linoleic acid grape seed oil and sweet almond oil can promote the synergistic effect of arbutin.5 Adding 0.8%-1.0% of azone in the cosmetic system can promote the absorption of arbutin, while preventing the precipita.