Bariatric surgery, alters the digestive process so as to achieve rapid weight loss. The operations can be divided into three types: restrictive, malabsorptive, and combined restrictive/malabsorptive. Restrictive weight loss surgeries limit food intake by creating a narrow passage from the upper part of the stomach into the larger lower part, reducing the amount of food the stomach can hold and slowing the passage of food through the stomach.
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