All I know is CALP is working for me. I read the book also CAD and the Healthy for Life by the Hellers and I'm following what the book says and after averaging my weight for this week, I've lost 3.2 lbs. I feel great and recommend anyone that wants to change diets to read first. If you don't , it won't work because you won't do it right. hope this helps. wawtigress