Macronutrients :They constitute the bulk of the diet and supply energy as well as essential nutrients needed for growth, maintenance, and activity. Carbohydrates, fats (including essential fatty acids), proteins, and water are macronutrients.
Vitamins, which are classified as water-or fat-soluble, and trace minerals are micronutrients
Essential trace minerals include iron, iodine, fluorine, zinc, chromium, selenium, manganese, molybdenum, and copper. Except for fluorine and chromium, each of these minerals is incorporated into enzymes or hormones required in metabolism.
The objective of a proper diet is to achieve and maintain a desirable body composition and a high potential for physical and mental work. The daily dietary requirements for essential nutrients, including energy sources, depend on age, sex, height, weight, and metabolic and physical activity.