What are the major nutrients in the body? The human body contains water, carbohydrates (sugar, starch, and fiber), amino acids (in proteins),fatty acids (in lipids), and nucleic acids (DNA and RNA).
What are the major nutrient categories? There are six major classes of nutrients: carbohydrates, fats, minerals, protein, vitamins, and water. These nutrient classes can be categorized as either macronutrients that are needed in relatively large amounts or micronutrients that are needed in smaller quantities. The macronutrients include carbohydrates, fats, protein, and water. The micronutrients are minerals and vitamins. The macronutrients provide structural material and energy.
What are carbohydrates? Carbohydrates may be classified as monosaccharides, disaccharides, or polysaccharides depending on the number of monomer (sugar) units they contain. They constitute a large part of grain-based products. Monosaccharides, disaccharides, and polysaccharides contain one, two, and three or more sugar units, respectively. Glucose is an example of a monosaccharide that is essential for the function of the body. It stimulates the production of insulin through food entering the bloodstream, which is grasped by the beta cells in the pancreas.