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While anyone can benefit from vitamin B12s energy-boosting properties, certain groups are particularly at risk of deficiency and may find these injections invaluable
People with dietary restrictions, such as vegans and vegetarians, who may not get sufficient B12 from their diet, or those with absorption issues, like those with pernicious anemia or gastrointestinal disorders, also often qualify
It peaks during the first 1 to 2 weeks after each dose increase, then gradually diminishes as your body adapts
[124] Other causes of B 12 malabsorption include bariatric surgery, pancreatic insufficiency, obstructive jaundice, tropical sprue, celiac disease, inherited intrinsic factor deficiency, and radiation enteritis affecting the distal ileum
306). This is likely due to decreased digestive enzyme production or decreased stomach acid resulting in a decreased ability to cleave B12 from its carrier proteins in animal foods
