Which of the following is NOT a macronutrient?

Vitamins are classified as micronutrients, which are essential for various bodily functions but are required in smaller amounts compared to macronutrients. Macronutrients include carbohydrates, proteins, and fats, which are needed in larger quantities to provide energy and support growth and maintenance of body tissues. Carbohydrates primarily serve as the body's main energy source, proteins are crucial for building and repairing tissues, and fats provide energy, support cell growth, and help absorb certain vitamins. Understanding the classifications of nutrients helps in recognizing their distinct roles in maintaining health and facilitating proper nutrition.