I know it's total food replacement but Chicken won't knock you out of ketosis, as the Atkins diet works on Ketosis aswell. In 8 weeks I've had 3 pieces of chicken, generally when i've been feeling ill (flu and stuff). And I have lost alot those weeks I did eat, when you look at my sig its not the low weeks. I haven't felt guilty about eating as if I feel like that about food then I'm not retraining my attitude towards it. I controlled and chose to eat.What I have found is when I have eaten,I would actually prefer a shake.