In the body, carbohydrate is metabolized mainly into glucose, a major source of immediate energy, which is delivered to body cells. Therefore, although fat calories are most easily converted to fat in the body, calories from carbohydrate, as well as from protein, will also be transformed into body fat if these calories are not expended.
Carbohydrates are an essential part of our diet, along with protein, fat, and water.
In addition, some carbohydrates are available in a variety of other foods, including fruits, vegetables, potatoes, legumes, nuts, soy, dairy products, sugars, and sweeteners. Of all of the carbohydrates available in food, fiber holds the most potential value. It is important to eat a diet rich in fiber because it helps you consume fewer calories from fat, and also helps regulate your bowel movements.