How many calories are contained in one gram of protein?

Protein is a crucial macronutrient that plays an essential role in various bodily functions, including building and repairing tissues, making enzymes and hormones, and supporting immune function. When it comes to energy content, protein provides approximately 4 calories per gram. This value is relevant not just for nutritionists and dietitians, but also for anyone looking to understand how macronutrients contribute to overall caloric intake and dietary planning.

The energy derived from protein is important for calculating total daily caloric needs, especially for those engaged in physical activities or strength training where protein intake is vital for muscle repair and growth. Understanding that protein yields 4 calories per gram allows individuals to better manage their diets, ensuring they receive enough protein for their specific health and fitness goals without exceeding their caloric requirements.