What is the calorie yield from 1 gram of protein?

The calorie yield from 1 gram of protein is 4 calories. This value is derived from the fact that proteins are composed of amino acids and, when metabolized, they provide energy for the body. Each macronutrient has a specific caloric value: carbohydrates yield 4 calories per gram, proteins yield 4 calories per gram, and fats yield 9 calories per gram.

Understanding the energy yield from macronutrients is crucial for nutrition planning and energy balance. Proteins play a vital role not only in providing energy but also in building and repairing tissues, forming enzymes and hormones, and supporting overall growth and development. Therefore, accurately recognizing the caloric content of protein can assist individuals in making informed dietary choices and achieving their nutritional goals.