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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.
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.
Malabsorption. There are a few reasons your body may not be able to absorb sufficient amounts of B12. If you’ve had gastric bypass surgery, your new alimentary pathway may bypass the section of ...
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.
A person may need surgery if dumping syndrome is caused by previous gastric surgery or if the condition is not responsive to other treatments. For most people, the type of surgery depends on the type of gastric surgery performed previously. However, surgery to correct dumping syndrome often has unsuccessful results. [1]
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Nonbilious vomiting, nausea, and abrupt onset stomach pain in the right upper quadrant are common symptoms in patients with acute afferent loop syndrome. Abdominal distension and postprandial epigastric discomfort lasting anywhere from a few minutes to an hour are common symptoms experienced by patients with chronic afferent loop syndrome.
Vitamin B12 does also accumulate in a few plant-based sources, including some mushrooms, seaweed, and nutritional yeast, but not enough to fortify vegans, who, in particular, should consider being ...