The ZO 3-Step Peel is a professional-grade chemical peel by Dr. Zein Obagi. It’s designed to resurface, correct, and rejuvenate skin via a three-step process. Below are the main benefits — what it does, how it works, what you can expect: What is it & how it works The peel consists of 3 parts: 1. Exfoliation (in-office peel) — uses acids (e.g. salicylic, lactic, trichloroacetic acid (TCA)) to remove surface dead skin cells and “open up” the skin.  2. Retinol stimulation — usually a 6% retinol cr