Production of energy
Other than fat and carbohydrate, one of the dietary macromolecules we acquire from our diet is protein. The small intestine totally breaks down proteins into amino acids after they have first been partially digested in the stomach.
A balanced diet is one that includes a variety of foods in the right amounts and ratios to meet the body's needs for calories, proteins, minerals, vitamins, and other nutrients. A small portion of the diet is also set aside for extra nutrients to last through the brief period of leanness.
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