Carbohydrates are your body's main energy source, the primary fuel for your cells. Carbohydrates are starches and sugars. Starches — found primarily in bread, rice, pasta, cereals and vegetables — are complex carbohydrates. Sugars — found in fruits, milk and foods made with sugar, such as candy and other sweets — are called simple carbohydrates or simple sugars.
Approximately 45 percent to 65 percent of your total daily calories — at least 130 grams — should come from carbohydrates. Complex carbohydrates and sugars from fruit and milk are preferred to simple sugars from candy and sweets. Your body absorbs complex carbohydrates more slowly than it absorbs simple sugars, providing you with more energy for a longer period of time. In addition, complex carbohydrates, fruit and milk provide more nutrients and fiber than sweets do.
(Source: Mayo Clinic website – www.mayoclinic.com)