Another term for the Roux-en-Y gastric bypass, the Roux bypass is highly regarded for its effectiveness in helping patients lose weight and improve health conditions related to obesity. Named after the French surgeon César Roux, this procedure is a combination of both restrictive and malabsorptive techniques. It requires a lifetime commitment to dietary changes, exercise, and regular follow-up with healthcare professionals.

Similar to the gastric balloon, the stomach balloon is used for weight loss by physically limiting the stomach's capacity. It is available in the UK both privately and through the NHS in some cases. The balloon is typically left in place for six months, after which it is removed. During this time, patients follow a strict diet to maximize weight loss.

The gastric bypass is the most powerful procedure, patients can expect to lose about70% of their excess weight in a two year period and maintain this in the long run. It also has the most profound effect on people who are suffering ill-health as a result of their weight

Sleeve bariatric surgery, also known as Vertical Sleeve Gastrectomy (VSG), is a restrictive procedure where 80% of the stomach is removed. This reduces stomach capacity, limiting food intake and helping with significant weight loss. It is one of the most popular forms of bariatric surgery due to its effectiveness and relatively lower risk compared to bypass surgeries.

Weight lost refers to the reduction in body weight that is typically achieved through lifestyle changes, medications, or bariatric surgeries like the RNY or gastric band. Weight loss, particularly significant or rapid weight loss, can have dramatic positive effects on a person's overall health, reducing the risk of heart disease, diabetes, and other obesity-related conditions. Successful weight loss usually requires long-term changes to diet, exercise, and behavior.