Hi Jane, I'm exactly the same! I can eat lean turkey or skinless chicken breasts until the cows come home and still feel unsatisfied. I feel much more satiated with dark cuts of poultry and red meats (as rare as possible), especially fatty lamb. I tried Cordain's approach -- lean meats, etc and it didn't work out for me (felt frequently hungry and the allowed fruit was bloating me) - but his plan certainly works wonders for others and I agree with the poster who said that Cordain's book has helped bring the no grain/no dairy/no legume/no sugar concept to the masses. Also, he has been most helpful in answering questions, both most recently and when I tried his approach to the letter yet still felt hungry. Despite the fact that I believe that for whatever metabolic reason I require far less carbs and far more purines and saturated fat for energy, I think his regime could certainly be a healthful diet for those who feel best on leaner proteins, fat and can tolerate more carbs than me. His book also contains much interesting info and some delicious recipes.