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

Adjustable gastric band Roux-en-Y Duodenal switch

Vitamin ASupplementation may be required, monitor5,000–10,000 IU/d10,000 IU/d
Vitamin B1Acute: 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/dProphylaxis: 50–100 mg/d
Vitamin B12Supplementation may be required, monitor300–500 μg/d (oral)Supplementation might be required, monitor
1000 mg/q 3 months (IM)
Folate400 μg/d400 μg/d400 μg/d
IronSupplementation may be required, monitor65 mg/twice daily65 mg/twice daily
CalciumSupplementation may be required, monitor1,500–2,000 mg/d1,800–2,400 mg/d
Vitamin DSupplementation may be required, monitor800–1,200 IU/d2000 IU/d
Vitamin ESupplement 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 KSupplementation may be required, monitorSupplementation may be required, monitor300 μg/d
CopperOral (1 mg/d) or IV fusion, response variableOral (1 mg/d) or IV fusion, response variableOral (1 mg/d) or IV fusion, response variable