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You know to avoid doughnuts at breakfast, but a bowl of cereal can contain just as much—or more—sugar. Sugar lifts your energy quickly, but that boost won’t last long, and your blood sugar level will spike fast. When it does, the parts of your brain that keep you alert shut down, making you even groggier. Here’s how “healthy cereal” can make you fat.
Nicole Fornaio/Rd.com, iStock/Mauro Matacchione
Energy drinks are designed to work short term, loading your body with caffeine and sugar. But once those start to wear off, your blood sugar will dip even lower than before, leaving you sluggish. Plus, they can dehydrate you, adding to your tiredness even more.