"Plastic surgery isn't the only way to keep the aging process at bay. With the proper care you can have fabulous skin in your forties, fifties, sixties and beyond," promises author Nicholas Perricone, M.D., assistant clinical professor of dermatology at Yale University School of Medicine. In his opening chapters, Perricone explains why skin wrinkles and sags--a combination of factors including the passage of time, stress, poor nutrition, excess alcohol consumption, sleep deprivation, and exposure to cigarette smoke, sunlight, and pollution. Ultimately, however, it all boils down to damage caused by those renegade free radicals.