A sugar-packed diet can take its toll on your waistline, but now experts also believe it can make your skin dull and wrinkled too. To blame is a natural process known as glycation, in which the sugar in your bloodstream attaches to proteins to form harmful new molecules called advanced glycation end products (AGEs, for short). The more sugar you eat, the more AGEs you develop; these damage surrounding proteins like collagen and elastin, which keep skin firm and elastic. Once damaged, springy and resilient collagen and elastin become dry and brittle, leading to wrinkles and sagging. These aging effects start at about age 35 and increase rapidly after that, according to a study published in the British Journal of Dermatology.