Information Most carbohydrates in our diet comes from plants.
Carbohydrates consist mostly of sugars and starches.
The liver converts glucose into glycogen which is the body's source of quickly available nutrition. The body converts excess glycogen to fat for future needs. Carbohydrates contain about 4 calories of energy per gram, the same as protein. Eat complex carbohydrates in preference to sugars. In part, this is because complex carbohydrates tend to be associated with foods with high values of other nutrients.