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Weight loss surgery can produce dramatic results, but it seems that keeping the weight off can be a challenge.

A new study from Israel found that many patients who underwent laparoscopic sleeve gastrectomy (LSG) surgery regained the weight they lost and saw a return of type 2 diabetes.

“The longer follow-up data revealed weight regain and a decrease in remission rates for type 2 diabetes and other obesity-related [diseases],” said lead study author Andrei Keidar, MD, of Beilinson Hospital in Israel, in a press release. “These data should be taken into consideration in the decision-making process for the most appropriate operation for a given obese patient.”

Weight loss surgeries are considered a last-ditch effort for severely obese patients who cannot lose weight through other methods.

An LSG surgery involves making small incisions in the abdomen and using a video camera (laparoscope) to perform the procedure.

About 75 percent of the stomach is removed during an LSG, but the intestines are left intact. This limits the amount of food that can be eaten at one time, while not disrupting the body’s natural absorption of nutrients.