Bariatric surgery is the most effective method of treating obesity today and can dramatically improve health, quality of life, and the day-to-day experience of regular activities. Most people who undergo bariatric surger lose their unwanted weight and keep it off. They are healthier, more active and need fewer medications than they did before weight loss surgery. In dition, bariatric surgery results in c surgery results in changes to patient's diet and behaviour in relation to eating. The key to any sort of successful treatment of obesity lies in the patient's diet and lifestyle.