The main types of bariatric (weight-loss) surgery are:

1. Sleeve Gastrectomy (Gastric Sleeve)

   • About 75–80% of the stomach is removed.

   • You feel full faster and eat less.

   • Most common bariatric surgery today.

2. Roux-en-Y Gastric Bypass

   • Creates a small stomach pouch and bypasses part of the small intestine.

   • Reduces food intake and calorie absorption.

   • Often helps improve type 2 diabetes.

3. Adjustable Gastric Band (Lap-Band)

   • A band is placed around the upper stomach to make a smaller pouch.

   • Less common now because weight loss is usually less effective.

4. Duodenal Switch (BPD/DS)

   • Combines a gastric sleeve with intestinal bypass.

   • Causes major weight loss but has higher risk of vitamin deficiencies.

5. SADI-S (Single Anastomosis Duodeno-Ileal Bypass)

   • A newer variation of the duodenal switch.

   • Strong weight-loss and diabetes-control results.

Bariatric surgeries work by:

• Restricting how much food you can eat

• Reducing calorie absorption

• Changing hunger hormones