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. Author manuscript; available in PMC: 2026 Jun 23.
Published in final edited form as: Surgery. 2012 Sep 6;152(4):758–767. doi: 10.1016/j.surg.2012.07.023

Table II.

Vitamin and mineral supplementation

Percent daily use per group, n
Vitamin/mineral DS/BD (N =173) RYGB (N = 136) P value
Calcium alone 40.5 (64) 39.2 (49) .82
Calcium plus vitamin D 53.7 (87) 48.4 (62) .37
Iron 39.9 (63) 34.7 (44) .36
Multivitamin 72.4 (118) 76.3 (100) .44
Vitamin ADEK 58.4 (94) 10.3 (13) <.001
Vitamin B12* 35.0 (56) 71.3 (92) <.001
*

Vitamin B12 supplementation was considered “daily” when the patient administered monthly injections.

Percentage of patients within each cohort taking vitamin and mineral supplements are shown.

DS/BD, Duodenal switch/biliopancreatic diversion; RYGB, Roux-en-Y gastric bypass.