Carbohydrates are the body's source of fuel, giving the body energy to be active and to carryon its daily metabolic activities. Carbohydrates contain four calories per gram of weight. Simple carbohydrates are found in simple sugars, such as table sugar, honey, corn syrup, sorghum, date sugar, molasses, brown sugar, powdered sugar, turbinado sugar, and any substance that ends in ose (for example, glucose and fructose).
Proteins have four calories per gram and are the most slowly absorbed foods. Until the early 1980s, fats were considered to be the slowest-absorbing of the three food groups. Research from a university on the East Coast determined otherwise. Proteins have a greater than 50 percent capability of being changed into glucose. While fats must be changed into ketone bodies before being used as an energy source, proteins need only to be changed into glucose.

