date:Jul 13, 2012
The researchers, from the USDAs Agricultural Research Service, call into question the validity of the most common way of determining the calorie content of foods the Atwater general factor system.
The system assumes that the main food components protein, fat, and carbohydrate have a single energy factor, regardless of the food in which they are found. Carbohydrates and proteins are considered to contain four calories per gram, fat nine calories per gram, and the system also includes a valu