 Participants having obesity surgery will receive laparoscopic minimally invasive surgery performed by making several small incisions in the abdomen and inserting a camera called a laparoscope an adjustable gastric band, a sleeve gastrectomy or roux en Y gastric bypass. In addition to the regular surgical procedures, the surgeons will remove laparoscopically about 10g 1 tablespoon of fat from within the abdomen. This fat tissue will be processed and stored for future study at completion of the study of your metabolism pre-treatment. Participants will complete post-operative follow-up appointments with their surgeon as required. 