What are the three primary macronutrients supplying the body's energy needs?
Answer
Carbohydrates, proteins, and fats
Macronutrients are defined as the nutrients the body requires in relatively large amounts daily, and they are the components that supply the body's energy needs. The text specifically identifies these three primary macronutrients as carbohydrates, proteins, and fats (lipids). Carbohydrates serve as the preferred, readily accessible energy source; fats are highly concentrated sources of energy; and while proteins are primarily structural, they can also be utilized for energy if necessary, differentiating them from micronutrients like vitamins and minerals, or water, which provide no caloric energy.
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