What is the energy value for 1g of protein?

The energy value for 1 gram of protein is 17 kJ. This value is important in nutrition as it helps individuals understand the amount of energy they derive from protein consumption. Proteins are made up of amino acids, and when they are metabolized, they provide energy that the body can use for various functions, including growth, repair, and maintenance of tissues.

This figure is established based on the metabolism of protein, where each gram contributes a specific amount of energy in kilojoules. While carbohydrates and fats also provide energy, they do so at different rates — carbohydrates provide about 16 kJ per gram, and fats about 37 kJ per gram. The nutrient composition in foods varies, but proteins stand out due to their unique role in muscle development and metabolic functions while also providing energy.

This understanding of protein's energy value is crucial for anyone studying nutrition, as it helps in meal planning and understanding dietary needs based on different life stages, physical activity levels, and health goals.