As a amphoteric compound, allantoin may combine many substance to form double salt, and has functions of keeping out of the sun, sterilization, anticorrosion, pain-killing and antioxidation etc. Allantoin may help to keep moist and soft of the skin, is a specific additive in cosmetics for hairdressing and beauty etc., is widely used in freckle cream, acne lotion, shampoo, soap, toothpaste, shave (the face), conditioner, astringent, and anti-sweat & deodorization agent. The cosmetics with allantoin added may protect the skin tissue, keep the skin to be hydrophilic, water absorptive, and prevent the water to be emitted etc. The hair cream, shampoo with allantoin added may protect the hair, help the hair from wake and splitting; the lipstick, cream with allantoin added may help the lip and skin to be soft and supple, and give them a nice glow. Allantoin may help to promote the tissue growth, cell metabolism, and soften cuticle protein.