Carbohydrates are classified as simple or complex. The classification depends on the chemical structure of the particular food source and reflects how quickly the sugar is digested and absorbed. Simple carbohydrates have one (single) or two (double) sugars while complex carbohydrates have three or more.

Examples of single sugars from foods include fructose (found in fruits) and galactose (found in milk products). Double sugars include lactose (found in dairy), maltose (found in certain vegetables and in beer), and sucrose (table sugar). Honey is also a double sugar, but unlike table sugar, contains a small amount of vitamins and minerals. (NOTE: honey should not be given to children under 1 year old.)

Complex carbohydrates, often referred to as "starchy" foods, include:

• whole grain breads and cereals
• starchy vegetables
• legumes

• fruits
• milk and milk products
• vegetables

• candy
• table sugar
• syrups (not including natural syrups such as maple)
• regular carbonated beverages