Bariatric surgery is procedure on stomach or intestines that help person with extreme obesity to lose weight, it recommended for people who have BMI with 40 or above, or a BMI of 35 with health problems. The most common types of bariatric surgeries are gastric bypass, sleeve gastrectomy and gastric banding. Each surgery has its own risk factors and benefits.
Firstly, gastric bypass surgery is done by connecting the proximal portion of the stomach with small intestine to reduction stomach size, so person feel full with less food and less absorption of calories and nutrients.