What property characterizes macro-nutrients compared to micro-nutrients?

Macro-nutrients are characterized primarily by their role as providers of energy. This group includes carbohydrates, proteins, and fats, which are essential for fueling the body's activities, supporting growth, and maintaining overall health. Each gram of macronutrient contributes a specific amount of energy, measured in calories. For instance, carbohydrates and proteins provide approximately 4 calories per gram, while fats provide about 9 calories per gram. This energy contribution is fundamental for bodily functions, physical activity, and sustaining life.

While micro-nutrients—such as vitamins and minerals—play crucial roles in the body, their primary function is not to provide energy but rather to assist in biochemical processes, catalyze reactions, or perform various health-supporting functions at a cellular and physiological level. Though essential, they do not have the same energy-providing properties as macro-nutrients.

Understanding this distinction is important for comprehensive nutritional planning and ensuring individuals receive adequate energy and nutrients to support their overall health and fitness goals.