I think I lost about 19 pounds in my first month, so this isn't way out of line. You have to remember that the first week of any new "diet" is going to be a bigger than normal loss...water weight and solids from the colon that aren't replaced the way they had been in the past. Be prepared, the weight loss should slow down somewhat, but so long as you follow your dr's directions, you should continue to lose at a good clip.