What are the kcal/g values for carbohydrates and proteins?

Carbohydrates and proteins provide a specific amount of energy that is calculated based on their chemical composition and how the body metabolizes them. Both carbohydrates and proteins yield approximately 4 kilocalories (kcal) per gram. This value is a standard measure used in nutrition to estimate the energy contribution of these macronutrients in the diet.

Understanding this value is important for dietary planning, as it helps individuals balance their intake of different macronutrients based on their energy needs, which can vary depending on factors like age, sex, activity level, and overall health. Carbohydrates are often the body's primary source of energy, while proteins play vital roles in tissue repair, enzyme function, and hormone production.

The incorrect options reflect values that do not accurately represent the energy density of these macronutrients. Knowing that carbohydrates and proteins both provide 4 kcal/g aids in making informed nutritional decisions and fosters a deeper understanding of how these components function in fueling the body.