How many calories are there in one gram of protein?

One gram of protein contains 4 calories. This is a standard nutritional value used in dietary science. Proteins are essential macronutrients that play crucial roles in the body, including building and repairing tissues, and serving as building blocks for enzymes and hormones. When calculating the caloric content of a meal or dietary plan, knowing that protein contributes 4 calories per gram is essential for proper nutrition management.

In contrast, fat contributes 9 calories per gram, while carbohydrates also provide 4 calories per gram. This knowledge is fundamental for personal trainers and nutritionists to create effective dietary plans tailored to individual fitness goals, whether focusing on muscle gain or weight loss. Understanding these values allows for accurate calculations and adjustments in macronutrient ratios according to specific dietary needs.