If all goes well, your mouth will be getting a lot of attention from your date. The last thing you want is a stained set of pearly whites, and blueberries have a nasty habit of turning your teeth and tongue a not-so-sexy shade of blue. But we don't want to completely shun the superfood. It's packed with fiber, vitamin C, and antioxidants, so it's a great addition to your diet—just maybe not tonight.
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