A strict vegetarian diet may promote a B12 deficiency because animal-based foods such as red meat, dairy products, fish, poultry and eggs are the only recognised source of dietary B12, said the Center for Peripheral Neuropathy.
The health site continued: “A lack of B12, or the inability of stomach acids to aid in the absorption, also causes this deficiency.
“Consequently, drugs that reduce stomach acid should be taken with B12 supplements.
“A number of other conditions, procedures, and drugs are associated with a reduced the ability to absorb B12.
“These include autoimmune diseases, pernicious or unexplained anaemia, pancreatic diseases, ileal resection, Crohn’s disease, HIV infection, gastritis, gastric or small intestine surgeries, malabsorption syndromes, multiple sclerosis, and use of histamine2 receptor antagonists or proton pump inhibitors.”