QUESTION: "I'd like to use retinol products, but I have sensitive skin. What can I do to prevent irritation?"
ANSWER: Regardless of your skin type, the most important thing to remember is that you have to slowly build up tolerance when using this potent vitamin A derivative to treat fine lines. "Retinol can be very drying," explains N.Y.C. dermatologist Anne Chapas, who says to apply it every other night for the first week. Formulas with soothing vitamin E and green tea, such as Peter Thomas Roth's Retinol Fusion PM ($65; sephora.com) and Philosophy's Miracle Worker Anti-Aging Retinoid Pads and Solution ($70/set; philosophy.com), also help minimize flaking.Read MoreLess