A novel cosmetic containing 4% niacinamide, SSTT (P&G Japan, Kobe, Japan), was evaluated with a control cosmetic without niacinamide. The base solution of SSTT contained 4% butylene glycol agent as an oil-in-water moisturizer. Each 0.3 g of SSTT and the control was applied to a half of the face b.i.d. after washing the face for 8 weeks.