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Vitamin B 12 deficiency is quite common after gastric bypass surgery with reported rates of 30% in some clinical trials. [journal 13] Sublingual B 12 (cyanocobalamin) appears to be adequately absorbed. In cases where sublingual B 12 does not provide sufficient amounts, injections may be needed. Protein malnutrition is a real risk.
Low serum levels of Vitamin B12, Vitamin A, Vitamin D, Vitamin E, and Vitamin K are common nutritional deficiencies after the surgery. 1000 mg of Vitamin B12 is recommended monthly, and supplements of vitamins and minerals are also recommended for the first half to full year after the surgery until the rapid weight loss period has passed. [2]
Bypass of the terminal ileum, which is the specific site of vitamin B 12 absorption, leads to Vitamin B 12 deficiency with a specific peripheral neuropathy. Vitamin A deficiency can induce night blindness. Calcium oxalate renal stones occur commonly following JIB, along with increased colonic absorption of oxalate. The colonic absorption of ...
Deficiencies of micronutrients like iron (15%), vitamin D, vitamin B12, fat-soluble vitamins, thiamine, and folate are common after bariatric procedures. [ 27 ] [ 29 ] Such deficiencies are potentiated by alterations in absorption and lack of appetite and often require supplementation.
Weight loss surgery relies on various principles: the two most common approaches are reducing the volume of the stomach (e.g. by adjustable gastric banding and vertical banded gastroplasty), which produces an earlier sense of satiation, and reducing the length of bowel that comes into contact with food (e.g. by gastric bypass surgery or ...
Impaired B 12 absorption can also occur following gastric removal (gastrectomy) or gastric bypass surgery. In these surgeries, either the parts of the stomach that produce gastric secretions are removed or they are bypassed. This means intrinsic factor, as well as other factors required for B 12 absorption, are not available
Duodenal-Jejunal Bypass Liner, or Gastric Bypass Stent [1], Common brand names include EndoBarrier, is an implantable medical device in the form of a thin flexible 60 cm-long tube that creates a physical barrier between ingested food and the duodenum/proximal jejunum.
Various methods of gastric bypass or gastric restriction surgery are used to treat morbid obesity. Roux-en-Y gastric bypass surgery (RYGB) but not sleeve gastric bypass surgery or gastric banding, increases the risk of vitamin B 12 deficiency and requires preventive post-operative treatment with either injected or high-dose oral supplementation.
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