Exposure to ultraviolet light is a well-documented cause of immunosuppression, matrix degradation, premature facial aging, and skin cancer. Because sunscreens can limit ultraviolet-induced skin damage and production of matrix metalloproteinases, they are accepted as the most active and beneficial of antiaging products. Understanding the variety of ingredients available, and their individual advantages and disadvantages, will allow a clinician to make more informed recommendations regarding the use of sunscreens.
Jennifer Linder, MD, is a dermatologist and Mohs micrographic skin surgeon, serving as the Chief Scientific Officer for PCA SKIN, Scottsdale, Arizona. She holds a clinical faculty position in the Department of Dermatology at University of California San Francisco, is a spokesperson for The Skin Cancer Foundation, and is a member of the AAD, the ASDS, and the ACMMSCO.
Address correspondence to Jennifer Linder, MD, 6710 E. Camelback Road, Suite 220, Scottsdale, AZ 85251 (e-mail: firstname.lastname@example.org).
The author has no conflict of interest to disclose.