Weight-loss surgery increases patients’ risk of dangerous anemia two-fold, according to a new observational study.
Researchers at Stanford University analyzed a group of people, with an average age of 51, who underwent a Roux-en-Y gastric bypass to treat obesity.
At the start of the study, before operating, 20 percent of them had the red blood cell deficiency. At their 10-year follow-up, that rate more than doubled to 47 percent.
Rates were particularly high among those who had not scheduled a check-up, but merely responded to a spontaneous phone interview.
The researchers warn the study, published today by JAMA, shows patients need to be more conscious about the need to take nutritional supplements as their digestive system changes after surgery.
