Gastric bypass 'ups anaemia risk fivefold'

The longest study yet on nutritional deficiency linked to bariatric surgery underlines the need for ongoing monitoring of patients, researchers say

People who have undergone gastric bypass are five times more likely to develop anaemia than those with obesity treated non-surgically, according to a study with up to 20 years’ follow-up.

Gastric bypass surgery

Vertical-banded gastroplasty and gastric banding were also linked to anaemia but to a lesser extent, the data showed.

“These findings highlight the importance of long-term compliance to nutritional supplementation and monitoring to enable prevention and early detection of serious nutritional