Brand from Japan: Kisocare. For those who feel that their skin tone is becoming uneven due to fluctuations.A beauty serum containing 15% azelaic acid derivative.Point 1 - azelaic acid derivatives.Suppresses sebum secretion and balances the skin's moisture and sebum, leading to smooth and firm skin.Azelaic acid derivatives: azeloyl diglycine K, water (as a skin conditioning ingredient).Point 2 - contains the popular ingredient niacinamide.Niacinamide (as a skin conditioning ingredient) is a type of vitamin B that helps balance the skin's moisture and oil content, leading to firmer, more radiant skin.Point 3 - the stable vitamin C derivative APS (sodium ascorbyl phosphate (as a skin conditioning ingredient)).APS (display name: sodium ascorbyl phosphate), a fast-acting, stable vitamin C derivative, is widely known as the king of skin care products.Compared to regular vitamin C (pure vitamin), it is less susceptible to oxidation and is converted into vitamin C within the stratum corneum, making it