I just posted with the same concerns a few days ago. I was on a 3 week plateau as well and it was the most frustrating thing I have ever endured. The only thing that I can suggest is make sure you don't miss any meals, drink, drink, drink water until your sick of it, and up your exercising. Your body does take time to adjust to the weight loss, so give it some time! I hope this helps, good luck to you....Liane-Open RNY 4/19/2002 -53#'s