| | | 25 | | | 20 30 | |  | | 25 | | | | | | | | | | | |  | | vitaminA | | | | 30 40 | |  | | | | | A C | |  | | A C | | | | | | | |  | | (Niacinamide) | | | | | (Alpha Hydroxy Acids) | | | | | 40 50 | | | |  | | | | | |  | | A ( ) | A ( ) | |  | |