Which nutrients are classified as macronutrients?

Macronutrients are nutrients that are required in larger amounts by the body to provide energy and support overall bodily functions. The correct classification of macronutrients includes carbohydrates, proteins, and fats. These three groups are essential for a variety of physiological processes, including energy production, cellular structure, and the regulation of metabolism.

Carbohydrates serve as the body's primary energy source, while proteins are vital for building and repairing tissues and supporting immune function. Fats provide a concentrated source of energy and are necessary for the absorption of fat-soluble vitamins as well as for hormone production.

Other options mention vitamins, minerals, fiber, water, antioxidants, and phytochemicals, which play important roles in nutrition but are categorized differently. Vitamins and minerals are considered micronutrients because they are required in smaller amounts. Fiber, while important for digestive health, is also classified as a type of carbohydrate but does not provide energy. Water is essential for life but is not categorized within the macro or micronutrient definitions. Antioxidants and phytochemicals, found in various plant foods, contribute to health benefits but do not fall within the macronutrient classification either.