A calorie is a calorie is a calorie, right? Wrong,

says Dr. Martin Katahn, on the basis of exciting

new metabolic research performed in his clinic

at Vanderbilt University and at other research

facilities around the country. When you eat a

caloric of fat, it passes easily and efficiently

into fat storage--and we all know what that

means. But when you eat a caloric of a complex

carbohydrate--an apple or a piece of whole-

grain bread the body has to work much

harder to get energy, or make fat, out of that

calorie, and much of the caloric value is wasted

as heat. This is the thermogenic effect, or, in Dr.

Katahn s phrase, the T-Factor. These metabolic

studies prove that it is primarily the fat in your

diet that determines your body fat, and the

protein and carbohydrate calories don t really

matter very much.