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Summary : Vitamin B12 has many alleged health benefits but the studies do not provide enough evidence for these claims
The two work through independent mechanisms
Other common causes of vitamin B12 deficiency include gastrectomy, ileal resection, pancreatic insufficiency and malabsorption syndromes including Crohns disease and coeliac disease. The bottom line : for patients with the above gastrointestinal challenges, getting enough B12 into the bloodstream through oral supplementation is not possible
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