Which nutrient is NOT considered a macronutrient?

The choice of vitamins is correct because vitamins are classified as micronutrients, not macronutrients. Macronutrients are nutrients that are required in larger amounts in the diet and primarily provide the body with energy and necessary building blocks for growth and maintenance. Carbohydrates, proteins, and fats all fall under the macro category as they are essential for energy production, tissue repair, and overall bodily function.

In contrast, vitamins, while vital for various metabolic processes, are required in much smaller amounts. They do not provide energy themselves but are crucial for many biochemical reactions in the body, acting as coenzymes and cofactors. This distinction in the required quantities and roles in the body highlights why vitamins are not categorized as macronutrients like carbohydrates, proteins, and fats.