5 ‘Healthy’ Foods That May Be Causing Your Breakouts

Sure, they offer a few nutrients, but that’s where the good stuff ends. Whether you enjoy it freshly blended, prepackaged, or from a chain-juicing vendor, smoothies provide a sugar overload that rivals a milkshake. Much of it comes from fructose, the dominant sugar in fruit. One study with two groups of rats fed high-fructose diets suffered increased glycation, AGEs, peroxidation, and other skin damage. (The antioxidant alpha-lipoic acid reduced that damage.)

Easy swap: Make your own juice using mostly leafy and cruciferous greens, which you can flavor up with a little lemon or frozen raspberries. Try any of these refreshing green smoothies that’ll give you stronger and healthier skin, hair, and nails.