Legumes are a great source of food to up your energy! Legumes such as beans, peanuts and peas are a wonderful source of magnesium, a mineral that is essential for your body to create energy. For example when you exercise your body uses magnesium to help energy molecules move to where they are needed. If you are low on magnesium you’ll most likely start feeling tired more quickly. Your recommended daily amount of magnesium is 320 milligrams. Great sources are white beans and peas.