What are the six classes of nutrients essential for human health?

The six classes of nutrients that are essential for human health include carbohydrates, proteins, fats, vitamins, minerals, and water. Each of these categories plays a vital role in the functioning of the human body.

Carbohydrates serve as the primary source of energy, while proteins are crucial for tissue repair and growth, and fats provide essential fatty acids and are important for energy storage, as well as serving various structural and regulatory functions in the body. Vitamins and minerals play diverse roles in metabolic processes, ensuring that chemical reactions occur efficiently and maintaining overall health. Water is essential for hydration, facilitating digestion, and transporting nutrients throughout the body.

The other options include elements that either do not fit within the traditional classifications of nutrients or include substances that are not essential for health. Phytochemicals, while beneficial, are not classified as essential nutrients. Fiber, while important for digestive health, is not classified as one of the six primary nutrient categories. Alcohol is not considered a nutrient because it does not provide essential functions and can be detrimental to health in excessive amounts.