Peels and potions     Over the counter versions include Neutrogena's Healthy Skin Anti -Wrinkle Intensive Face lotion and Green Cream sold online at www.skincarerx.com   Green Cream features three different strengths of Retinol products. Level 3 is the mildest formula that is ideal for sensitive skin types and easing into a Retinoid regimen. Level 6 is formulated for a broad audience and makes improvements in overall skin health. Level 9 contains the strongest Retinol available without a prescription. They recommend beginning with Level 3 or Level 6, and after 3 to 6 months integrate Level 9 into the routine.