Bariatric procedures are used to induce weight loss by means of limiting food contents by the stomach. This results in a reduction of nutrient absorption and also gastric constraint. Hormonal changes are often associated with this type of procedure. Most of these procedures are performed by techniques that seek to minimize the side effects (laparoscopic surgery).
Surgeries that fall under this category are: gastric bypass, sleeve gastrectomy, adjustable gastric band, and biliopancreatic diversion with duodenal switch.