“About 1 in 10 people who have stomach surgery develop dumping syndrome.1 Dumping syndrome is more common after some types of surgery than others.
For example, dumping syndrome is more common after gastric bypass surgery than after other types of weight-loss surgery, also called metabolic and bariatric surgery. Dumping syndrome is also more common after a gastrectomy that removes the entire stomach than after a gastrectomy that removes only part of the stomach.
Early dumping syndrome is more common than late dumping syndrome. Some people have both forms. Among people with dumping syndrome, about 1 in 4 have late dumping syndrome alone.2″
National Institute of Diabetes and Digestive and Kidney Diseases (Definition & Facts for Dumping Syndrome – NIDDK)