Some are used as contractile proteins which allow muscles to contract and lift the weight. Other proteins are enzymes that cause chemical reactions within the body, and some proteins can be used for energy. Eat at least four servings of vegetables and three servings of fruits a day. Snack on https://redbottom.us/categories/regular/health/222-the-comprehensive-guide-to-pediatric-nutrition-optimizing-health-from-infancy-to-adolescence