Table 2: Postoperative vitamin supplementation recommendations differentiated by the specific type of bariatric surgical procedure.

Adjustable gastric band Roux-en-Y Duodenal switch Vitamin A Supplementation may be required, monitor 5,000–10,000 IU/d 10,000 IU/d Vitamin B1 Acute: 100 mg/d × 7–14 d (IM) then 10 mg/d (oral) Acute:100 mg/d × 7–14 d (IM) then 10 mg/d (oral) Supplementation may be required, monitor Prophylaxis: 50–100 mg/d Prophylaxis: 50–100 mg/d Vitamin B12 Supplementation may be required, monitor 300–500 μg/d (oral) Supplementation might be required, monitor 1000 mg/q 3 months (IM) Folate 400 μg/d 400 μg/d 400 μg/d Iron Supplementation may be required, monitor 65 mg/twice daily 65 mg/twice daily Calcium Supplementation may be required, monitor 1,500–2,000 mg/d 1,800–2,400 mg/d Vitamin D Supplementation may be required, monitor 800–1,200 IU/d 2000 IU/d Vitamin E Supplement with standard multivitamin formulation rich in vitamin E (60 IU/d) Supplement with standard multivitamin formulation rich in vitamin E (60 IU/d) Supplement with standard multivitamin formulation rich in vitamin E (60 IU/d) Vitamin K Supplementation may be required, monitor Supplementation may be required, monitor 300 μg/d Copper Oral (1 mg/d) or IV fusion, response variable Oral (1 mg/d) or IV fusion, response variable Oral (1 mg/d) or IV fusion, response variable