Gastric Bypass May Lead to Bone Loss

Weight loss surgery may lead to bone loss, a study suggests. The study included 23 very obese men and women. All had gastric bypass surgery for weight loss. After surgery, researchers kept track of their levels of vitamin D and calcium. Calcium levels dropped and vitamin D remained steady despite increased intake of both. Bone density also fell. The decline was greatest for those who lost the most weight. The study was published September 23 in the Journal of clinical Endocrinology & Metabolism.