It may come as a big surprise to you that carbohydrate is the only macronutrient we don’t need. Carbohydrates can do only one of two things for us. They can either be burned as fuel or stored in the body, either as carbohydrate in the liver and muscles, or as fat in the liver and fat (adipose) tissues. There is no other option. Fats and protein, on the other hand, are important for building, developing and maintaining the body’s structures. In addition both fat and protein can be used as energy sources in the body.
