The Best from the Master of Beautiful Skin Dr. Zein Obagi. The procedure was only for 30 to 40 mins. I felt burning on my face but its worth it. I did the 3 Step Peel from Zo Medical by Dr. Zein Obagi. The peeling last for 6 days most probably and now I will be in my regular Medical Cream for my Melasma and I have a hyperpigmentation on my face of course from Zo Skin Health and Medical.. Try it.!