Source of calories

The phrase "source of calories" is a general term referring to any substance that provides energy (calories) through metabolic processes when consumed by organisms[1][4][7]. Major biological macronutrients serving as calorie sources are carbohydrates, fats, and proteins[1][4][7]. These are metabolized through cellular pathways such as glycolysis, fatty acid oxidation, and the citric acid cycle to produce ATP[1][4][7]. "Source of calories" is not a molecular entity, gene product, or drug receptor and is not classified as a therapeutic target. The term is too broad for use in molecular pharmacology or drug discovery.

Other names

food energycaloric sourceenergy sourcedietary caloriesnutrient energy