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Dr. Charles Mok explains how to use retinol safely, starting with three to five times per week and building up tolerance. Retinol increases sun sensitivity and causes peeling, so apply it at night and skip it before days with heavy sun exposure. It normalizes skin turnover and improves firmness, fine lines, and discoloration.
Questions this video answers
Three to five times per week, increasing as tolerated toward daily use.
At night.
When expecting heavy sun exposure (example given: going out on a boat on the weekend).










