When (and how) to use Nano Retinol 0.3% + Niacin Renewing Serum by Anua

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.