No clinic or hospital can guarantee, exactly how much weight you will lose, however, you can be reassured that the vast majority of people working ‘with’ their gastric balloon: i.e. using it as intended; as a tool to assist you, often when all other methods have failed, will lose an average of approximately 42 pounds (19kg) this applies to over 90% of those surveyed in global clinical trials and is also borne out with our own experience at the Cosmetic and Obesity Surgery Hospital India.