You will enjoy zein obagi 3 step peel the zo 3 step peel is a medical strength peel that contains 10 trichloroactic acid 10 salicylic acid 10 lactic acid and high dose retinol 6 it is indicated for patients of any skin type and colour who require a more potent peel minimum 6 week preparation is required before having the peel down time of 2 3 days designed for acne scars melanoma sun damage fine lines wrinkles and open pores