How different types of nutrients does …

a) Carbohydrates are compounds of carbon, hydrogen and oxygen, always in the ratio of 1:2:1. They provide instant energy. When oxidised in the body, one mole of glucose releases 686 kilocalories of energy.
b) Proteins are formed by carbon, hydrogen, oxygen and nitrogen. Proteins act as building blocks and serve as materials helping in growth and repair of the body cells and tissues. Protein helps in the formation of hair, nails etc.
c) Fats are also made up of carbon, hydrogen and oxygen. Fats have very little oxygen content. It is an important form of energy storage for future use.
d) Vitamins are the chemical substances that help in maintaining a healthy body. Vitamins A, D, E, and K are fat soluble and can be stored in the body.
e) Mineral salts are needed in the diet in small quantities. These are obtained from table salt, green vegetables and fruits.