How Much Energy in Kcal Does 1 Gram of Protein Yield?
•
6 min read
According to the Atwater general factor system, which is widely used for nutrition labeling, 1 gram of protein yields 4 kilocalories (kcal) of energy. This standard figure simplifies the calculation of caloric content for nutritional purposes, placing protein's energy value on par with carbohydrates and less than half that of fats.
