How many calories are in a single gram of protein?

A single gram of protein contains four calories. This is an important fact in nutrition, as it helps individuals understand how macronutrients contribute to their overall caloric intake. Proteins are essential macronutrients that play a significant role in building and repairing tissues, as well as serving various functions within the body, including hormone production and immune response.

When considering the caloric contributions of macronutrients, protein stands out with its four-calorie content per gram, which aligns with similar established values for carbohydrates, while fats provide a higher caloric value of nine calories per gram. This understanding is crucial for anyone involved in nutrition, fitness, or esthetics, as it aids in planning diets, managing weight, and ensuring adequate protein consumption for health and wellness goals.