how to stay cool

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Eat Like an Actress Preparing for a Beach Scene
Fruits and vegetables have a high percentage of water, which will keep you hydrated and cool. They're also easier to digest than high-fat or high-protein foods. The energy that your body exerts while breaking down cookout staples like hot dogs and hamburgers causes you to create more metabolic heat—leaving you sweaty as well as stuffed.

Next: 9 surprising reasons you can't stop sweating