Bariatric Surgery Procedures; Bariatric surgical procedures cause weight loss by restricting the amount of food the stomach can hold, causing malabsorption of nutrients, or by a combination of both gastric restriction and malabsorption. Bariatric procedures also often cause hormonal changes. Most weight loss surgeries today are performed using minimally invasive techniques (laparoscopic surgery). The most common bariatric surgery procedures are gastric bypass, sleeve gastrectomy, adjustable gastric band, and Each surgery has its own advantages and disadvantages. Obesity is when your body has too much fat. Obesity can cause a lot of damage to your body. People with severe obesity are more likely to have other diseases. These include type 2 diabetes, high blood pressure, sleep apnea, and many more. Combined with obesity, these diseases may lead people to have a lower quality of health. In some cases, these can lead to disability or early death.