Sounds too good to be true, right? Research shows you can increase your alertness by eating dark chocolate. Thatâ€™s thanks to flavanols, which are key components in dark chocolates. They work in dilating blood vessels, which allows more oxygen and blood to reach important parts of the brain. You also feel happier and more content. Flavanols are also found naturally in tea leaves and in certain fruits and vegetables, but the amounts vary.
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