Proper nutrition

Food provides nutrients from six wide classes: proteins, fats, carbohydrates, vitamins, dietary minerals, and water. Carbohydrates are metabolized to give energy. Proteins provide amino acids, which are necessary for cell, especially muscle, construction. Essential fatty acids are required for brain and cell membrane construction. Vitamins and trace minerals help maintain proper electrolyte balance and are required for a lot of metabolic processes. Dietary fiber is another food component which influences health even though it is not really absorbed into the body.

Any diet that fails to get together minimum nutritional requirements can threaten general health (and physical fitness in particular). If a person is not well sufficient to be active, weight loss and good quality of life will be improbable.