Vitamin D deficiency is prevalent among populations with severe obesity and those having bariatric surgery. Conclusion: This study showed 100,000 IUs ergocalciferol once a month is a safe and effective treatment for vitamin D insufficiency in most patients having bariatric surgery. Other mean changes at 1-year post-surgery that were not significantly different include calcium −0.264☐.45 and −0.21☐.509 mg/dl in control and intervention groups, respectively and HbA 1c −1.0☑.21 and −0.95☐.071% in control and intervention groups, respectively. The treated group showed a marginally higher mean increase in Vitamin D than the control group, p=0.059. One year after bariatric surgery, the mean changes from baseline in vitamin D levels were 2.69☙.4 and 12.4☑7.0 ng/mL in control and intervention groups, respectively. Results: Mean changes in BMI at 1-year post-operation was −18.12☖.46 kg/m 2 in the control group versus −18.84±4.7 kg/m 2 p=0.638 in the vitamin D group. Serum 25 (OH) D, calcium, and hemoglobin A1c levels were measured preoperatively and one year after bariatric surgery. ![]() Study design: Thirty-two subjects were randomly divided to receive an additional 100,000 IUs of ergocalciferol monthly after bariatric surgery (n=10) or standard level vitamin D supplement after bariatric surgery (n=22). Objective: Determine if serum 25 (OH) D levels improve by the consumption of an additional monthly ergocalciferol supplement by subjects after bariatric surgery. Optimal supplementation to treat vitamin D insufficiency is not clearly defined. ![]() Background: Vitamin D insufficiency is common before and after bariatric surgery.
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