It is important to understand that the gastric balloon is a tool to aid weight loss and is most effective when combined with a comprehensive lifestyle program delivered by your doctor and trained allied health team. The amount of weight loss to be expected is specific to each device; but in general, most devices will achieve 15-20% TBWL (Total Body Weight Loss; ie a 100kg person could expect to lose 15-20 kg on average*). Ultimately, the amount of weight you lose and maintain will depend on how closely you follow the advice of your doctor and allied health team.