ROBERT F. SCHILLING, M.D.; PAUL N. GOHDES, M.D.; GORDON H. HARDIE, M.D.
Gastric bypass surgery for obesity is a popular and partially effective operation. There are few studies of changes in chemistry after this operation. Wernicke-Korsakoff encephalopathy was seen in two patients at 3 months after bypass surgery (1). In one patient megaloblastic anemia appeared 6 years after surgery (2). Serum vitamin B12 was below normal in 26% of 69 patients (3). We are not aware of studies of vitamin B12 absorption or of the effect of oral supplementation in patients who have had bypass surgery. After a low serum vitamin B12 level was found in several patients, this study was done.
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SCHILLING RF, GOHDES PN, HARDIE GH. Vitamin B12 Deficiency After Gastric Bypass Surgery for Obesity. Ann Intern Med. 1984;101:501–502. doi: 10.7326/0003-4819-101-4-501
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Published: Ann Intern Med. 1984;101(4):501-502.
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Print ISSN: 0003-4819 | Online ISSN: 1539-3704
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