The makers of sunscreens and creams that claim to repair DNA damaged by sun and environmental exposure may be on to something, dermatologists say. Certain enzymes have been proven to heal and protect damaged skin, said Dr. Steven Q. Wang, director of dermatologic surgery and dermatology at Memorial Sloan-Kettering Cancer Center. However, the products have not been clinically tested, Wang said. Dr. Suzanne Kilmer, an American Society for Dermatologic Surgery board member, said she has used a DNA-repairing sunscreen and recommends it to her patients.

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