I started drinking protein shakes before discovering the primal diet and have found them hard to quit...I like the way they taste(the way I make them at least) and I have found that drinking one at lunch, after my workout, does an excellent job of keeping me full throughout the day. I have read Mark's bit about them on this site and have been trying to slowly work them out of my diet, but they're hard to give up. The Primal Fuel Mark sells is a little out of my price range. What are your thoughts on protein powder and the primal diet?