Macronutrients are the essential nutrients required by the body in large amounts to provide energy, support growth, and maintain overall health. They are divided into three primary categories: carbohydrates, proteins, and fats. Carbohydrates serve as the body’s main energy source, particularly during high-intensity activities, while proteins are crucial for muscle repair, growth, and the production of enzymes and hormones. Fats are vital for hormone regulation, nutrient absorption, and providing a concentrated source of energy. A balanced intake of these macronutrients is essential for optimal bodily functions, performance, and overall well-being.