Ph T Pure Retinol 0.3% is a specialized night cream formulated with pure retinol to target signs of aging and skin concerns. The 0.3% concentration provides effective treatment while being gentle enough for regular use. This is a dermatological product containing 0.3% pure retinol concentration. As with all retinol products, it should be used at night and followed with sunscreen during the day. Start with less frequent application (2-3 times per week) and gradually increase usage as skin builds tolerance. Discontinue use if irritation occurs.