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There are three primary macronutrients defined as being the classes of chemical compounds humans consume in the largest quantities and which provide bulk energy. These are protein, fat, and carbohydrate. This list shows the categorization of the most common food components by these macronutrients. Macronutrients can also refer to the chemical elements humans consume in the largest quantities, see Nutrient.
These 2 essential fatty acids are the starting point for other important omega-acids (e.g. DHA, EPA)