You may think of bananas, but green leafy veggies are a better source of this mineral. It helps keep your blood pressure in a normal range, and it helps your kidneys work. Levels that are too low or too high could make your heart and nervous system shut down. You should also watch your salt, because your body needs the right balance of sodium and potassium. Snack on raw cantaloupe, carrots, and tomatoes, too.
