smoothie

Photo: vladans/istock

4 of 6
Ordering that berry smoothie

Many of us associate high-sugar foods with acne, but it turns out that eating excess sweets can also speed up the aging process. "Recent research has shown that sugar damages skin fibers, which ultimately cause the skin to age faster," says Nazarian. Ideally, less than five percent of your daily calories should be from sugar. Steer clear of high-glycemic picks (like white bread or pastries) but also watch out for less obvious, sneaky sources that seem healthy but can be loaded with sugar, like fruit smoothies and flavored yogurts, says Nazarian.