La Roche-Posay Biomedic Retinol has three revolutionary Retinol formulas with a customizable step-up system. The BioMedic Retinol lotions are available in three different strengths of retinol to allow patients to work their way up to the highest strength. These silky, lightweight lotions are non-irritating and great for evening out skin tone, smoothing out fine lines and wrinkles, and preventing breakouts. Retinol 30 contains .30% Retinol. This strength is recommended only for those who have started on the Retinol 15 or have used Retinol creams in the past. 1 fl. oz.