Simple starches, like refined grains, are converted into simple sugars in the body. These sugars bind to tissues, which create harmful molecules called advanced glycation end (AGE) products that can damage collagen, leading to a saggy, wrinkly appearance. And that can take a toll on how you look: A high-sugar diet may start weathering your skin as early as age 35, reports a study in the British Journal of Nutrition. On the other hand, the fiber in whole-grain starches slows digestion and prevents blood sugar spikes, making them smarter picks for your energy levels—and face.
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