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Human clinical trials have not been completed
Those on specific medications Long-term use of antacids or metformin can interfere with absorption
Food becomes less interesting
Diagnosis and treatment, if B12 deficiency is found, next moves on to a course of regular injections over a couple of weeks to assess your levels and your symptoms, and a follow-up blood test weeks later to see whether B12 has been retained by the body
It is used to treat vitamin B12 deficiency in people with pernicious anemia and other conditions
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