ANUA Retinol 0.3% + Niacin Renewing Serum - Wrinkle, Anti-Blemish 8 Kinds of Peptides, Retinol Serum 30ml

User Instructions / Warnings: 1. During your PM skincare routine, apply less than half of the amount you normally used for serum on skin. 2. When used in the morning, apply sufficient sunscreen afterwards. 3. For the first two weeks of usage, use it once every two days to allow your skin to gradually get used to it.