Weight loss surgery is bad for bones

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Washington D.C.: Weight loss surgery can have far worse effects than initially thought. According to a study conducted by the Wiley, weight loss surgery can cause declines in bone mass and strength, and it is linked to an increased risk of bone fractures.

Skeletal changes after surgery appear early and continue even after weight loss plateaus and weight stabilises. Nutritional factors, mechanical unloading, hormonal factors, and changes in body composition and bone marrow fat may contribute to poor bone health.

Most studies have examined the effects of the Roux-en-Y gastric bypass procedure, which was the most commonly performed weight loss procedure worldwide until it was very recently overtaken by sleeve gastrectomy. Because sleeve gastrectomy is a newer procedure, its skeletal effects have not yet been well defined.

The review's findings indicate that clinical guidelines on weight loss surgery should address bone health as a priority. "Current clinical guidelines do address bone health, but most recommendations are based on low-quality evidence or expert opinion," said co-author Anne Schafer. "Future studies should address strategies to avoid long-term skeletal consequences of these otherwise beneficial procedures."

The study appears in the journal JBMR Plus.

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