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There are many possible causes of B12 deficiency eg diet, PA, Coeliac disease, H Pylori infection, Crohns disease, internal parasites such as fish tapeworm, exposure to nitrous oxide plus others
Cyanocobalamin is a stable, synthetic form widely used in supplements that the body converts to active forms as needed
However, research strongly suggests low B12 levels as a factor in NTDs, which isnt surprising, since folate and B12 work hand in hand
For people without a deficiency, benefits may be subtle or minimal
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