Gastrointestinal Disorders: Conditions like Crohn's disease, celiac disease, or a history of weight-loss surgery (like gastric bypass) can damage the exact parts of the intestine that are in charge of B12 absorption
In addition, if you're one the millions of Americans taking proton pump inhibitors, known as PPI's, that suppress stomach acid for conditions like acid reflux, you're going to be prone to Vitamin B12 deficiency
"Cognitive impairment and vitamin B12: a review"
The relationship between these conditions and coeliac disease development is unclear, but it is apparent that having coeliac disease increases the risk of developing other autoimmune conditions
Policy Registered dietitian Anna Taylor, RD, LD, shares some of the best ways to add more vitamin B12 foods into your diet
Medical Conditions Requiring B12 Therapy Some health problems need B12 shots