Retinoid is the general name for a group of drugs derived from vitamin A, which effectively treat many skin problems, contributing to comprehensive skin rejuvenation. Retinoid is considered a great invention of the dermatology industry, Retinoid products are currently widely used. However, surrounding the Retinoid group of drugs, there are currently many inaccurate "rumors" without scientific evidence, making many people hesitate to use this group of drugs.