 a couple of slices, a few ounces, four or five ounces of roast. I recommend medium-rare. But if you were to eat four or five ounces of roast, it's not going to turn into roast once it gets into and through the digestive system. Your body's going to turn that roast, the proteins in it, to amino acids. There's going to be fats, and they're going to be broken down into smaller and smaller and smaller units of fat.