I've heard that when you start Atkins, you "go deep" and have no sugars at all for a while to send yourself into ketosis faster (I don't get how that's good). Another thing I don't get about the meat-heavy diets: animals do a great job of concentrating nutrients and toxins from their food supply. Animals tends to depend on feed instead of grass and feed is loaded with weight-gainers. Shouldn't there be residue that would tend to make meat-eaters gain weight?