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Van Niel, G., DAngelo, G
Polycythemia vera has also been reported with parenteral methylcobalamin
The oral B12 supplements are at higher dosages than the amount you'd get from food, which increases the likelihood that enough B12 will reach the bloodstream, even when absorption is compromised
For example, while many people with Alzheimers disease are found to have low vitamin B12 levels, there is no improvement in cognitive function after supplementation with high doses of vitamin B12
Notably, the highest dose tested (54 mg) showed increased gastrointestinal event frequency compared to lower doses, suggesting a dose-relationship for this effect category
Dr Andrew Webb, clinical senior lecturer at Kings College London and a co-author of the study, said: By increasing nitric oxide production, dietary nitrate from beetroot juice may help improve blood vessel function and support kidney health
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