A man that I work with had gastric bypass a few weeks ago. He lost 17 pounds (I think) during the liquid diet that he followed for the 2 weeks before the surgery; two weeks after the surgery he'd lost a total of 40 pounds! His insulin requirement dropped dramatically, though he will always be diabetic...became one when he was six years old.

He only took one week off work, though some days he does get really tired.

Best of luck to you...let us know how it goes!