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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
& Farese, R
Understanding the interplay between its rapid clearance and its prolonged biological effect is essential for interpreting its unique research applications
Roth JL and Pfeiffer CJ
For vegetarians and vegans, fortified foods and supplements are often necessary to meet their vitamin B12 needs
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