Obagi Zo Retinol Skin Brightener 0.5% 50MlObagi ZO Retinol Skin Brightener 0. 5% 50Ml Achieve a smoother, brighter, and more youthful looking complexion with Obagi ZO Retinol Skin Brightener 0. 5%. This advanced skincare formula combines the power of retinol with skin brightening support to help improve the appearance of uneven skin tone, fine lines, and dullness while promoting healthier looking skin. Designed with a lightweight and fast absorbing texture, it works overnight to refine skin