Vitamin D status before Roux-en-Y and efficacy of prophylactic and therapeutic doses of vitamin D in patients after Roux-en-Y gastric bypass surgery.

Background: Literature regarding the effect of Roux-en-Y gastric bypass (RYGBP) on vitamin D level shows contradictory findings. Our goal was to determine preoperatively vitamin D levels, to evaluate the efficacy of therapeutic and prophylactic doses of vitamin D and to assess the relationship of 25-OH vitamin D level and body mass index (BMI).

Methods: We conducted a retrospective cross-sectional study of 72 patients who underwent RYGBP from April 2007 to October 2007 in Bariatric Surgery Department at Saint Vincent Charity Hospital.