2. Which gastric surgery carries the highest risk of dumping?

Gastric bypass Roux en Y surgery is more likely to be associated with dumping, since the food reaches the colon rather fast as a major portion of the small intestine is bypassed.

3. Which gastric weight loss surgery is associated with minimal risk of dumping?

Adjustable gastric banding and vertical banding gastroplasty are much less likely to cause dumping.