Apply 1⁄2 or 1 ampule of vitamin C and wait a few minutes. Apply a thin coat of retinol cream on the area. Allow to act for approximately 8 hours. Wash the treated area.
Ampoules:
· 10% Ascorbyl glucoside.
· 5% Niacinamide.
Powder:
· 4% Retinol.
· 1% Retinyl propionate.