People who have obesity operations, such as gastric bypasses or banding, double their risk of suffering fractures, US research suggests.
Researchers for the Mayo Clinic in the US reviewed nearly 100 surgical cases spanning 21 years for their study.
They found a fifth of patients suffered fractures - twice the rate typical for their age - with most breaks occurring in the bones of the hands and feet.
The findings will be presented at the Endocrine Society Annual Meeting.
In the study, 21 individuals experienced 31 fractures within an average of seven years after their weight loss or bariatric surgery.