A major source of energy in the diet. There are two kinds of carbohydrates; simple carbohydrates and complex carbohydrates.
Protein is an essential nutrient that helps build many parts of the body, including muscle, bone, skin, and blood.
A major source of energy in the diet. All food fats have 9 calories per gram. Fat helps the body absorb fat-soluble vitamins, such as vitamins A, D, E, and K, and carotenoids.