After having tried everything to lose weight, some people are no longer able to live normally and their health is in danger: hypertension, diabetes, sleep apnea, heart problems, pain and among other deep malaise. Thus, bariatric surgery is their last resort to take control of their lives. Moreover, the operation is not without risk and can have serious and irreversible consequences. It must also be accompanied by a radical change in lifestyle and constant psychological support. Witnesses therefore agreed to let themselves be filmed for three years by cameras.