The essential nutrients can be acquired from the environment. There are two types of nutrients :
- Macronutrients
- Micronutrients
Macronutrients provide bulk energy in metabolic system while micronutrients need in relatively small quantities and do not provide energy to the body. The macronutrients consist of carbohydrate, protein and fat. Vitamins, minerals and trace elements were grouped into micronutrients.
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