Monitoring for micronutrient deficiency after bariatric surgery - what is the risk? (original) (raw)

Background: Bariatric surgery may increase the risk of micronutrient deficiencies; however, confounders including preoperative deficiency, supplementation and inflammation are rarely considered. Objective: To examine the impact of bariatric surgeries, supplementation and inflammation on micronutrient deficiency. Setting: Two public hospitals, Australia. Methods: Participants were recruited to an observational study monitoring biochemical micronutrient outcomes, supplementation dose, inflammation and glycemic control, pre-operatively and at 1-3, 6 and 12 months after gastric bypass (GB; Roux-en-Y Gastric Bypass and Single Anastomosis Gastric Bypass; N=66) or sleeve gastrectomy (SG; N=144). Participant retention at 12 months was 81%. Results: Pre-operative micronutrient deficiency was common, for vitamin D (29-30%), iron (13-22%) and selenium (39% GB cohort). Supplement intake increased after surgery; however, dose was <50% of target for most nutrients. After SG, folate was vulnera...