ZO Skin Health Retinol Skin Brightener .5%ZO Retinol 0. 5 Step up your anti aging routine with Retinol 0. 5a moderate strength retinol that refines wrinkles and improves skin clarity. Whats Inside: 0. 5% Retinol with supportive hydrating agents Key Benefits: Visibly reduces fine lines and discoloration Boosts collagen production and skin renewal Balances exfoliation with hydration Suitable for intermediate retinol users Ideal for those ready to advance their retinol treatment.