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Although there is a relationship between low vitamin B 12 levels and cognitive decline, clinical studies - including those involving people with Alzheimer's disease - have not shown improvement in cognitive function, even doses of vitamin B 12 as high as 1000 micrograms per day
Beijing Methycobal Clinical Trial Collaborative Group]
The efficacy of these products has not been confirmed by FDA-approved research
A B12 deficiency occurs when the body lacks an adequate supply of vitamin B12, leading to various symptoms, including fatigue, weakness, and neurological issues
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