Vitamin B12's limited effect on Alzheimer'sRole of vitamin B12 and folic acid in treatment of Alzheimer's disease: a meta-analysis of randomized control trials.
We explored the potential role of vitamin B12, alongside folic acid, in slowing the progression of Alzheimer's disease (AD) through a meta-analysis of randomized control trials. Our aim was to determine whether these supplements might improve cognitive function, daily life activities, and influence blood homocysteine levels in individuals diagnosed with AD.
After carefully sifting through studies, we found five that met our criteria. These studies assessed the cognitive changes in participants through the Mini-Mental State Examination (MMSE) and the Alzheimer's Disease Assessment Scale-Cognitive Subscale (ADAS-Cog). Additionally, they examined the impact on daily functioning as well as blood homocysteine levels.
The results showed that after six months of treatment, participants taking vitamin B12 and folic acid did experience a slight improvement in MMSE scores compared to those on a placebo. However, there was no significant change in the ADAS-Cog scores, which means some cognitive aspects didn’t show marked improvement. Likewise, daily life functioning did not see any benefits from the supplements.
Importantly, we also noted a significant reduction in blood homocysteine levels following the supplementation, suggesting a biochemical effect of the treatment. Overall, while vitamin B12 shows promise in enhancing some cognitive measures, it does not translate directly into broader cognitive or daily functioning improvements in Alzheimer's patients.
Supports neuron function
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Unlike cyanocobalamin, methylcobalamin is a naturally occurring form of vitamin B12, more active and better absorbed in higher amounts. It aids neuronal lipid production, promotes axonal nerve regeneration, and has neuroprotective properties that enable neurons to function properly, thus assisting with Alzheimer’s disease, Parkinson’s disease, dementia, and neuropathic syndromes. A starting dose of 1000mcg is advisable, and it is considered non-toxic, as the body absorbs only what it needs—any excess is excreted. The tablets are small, pink, and sweet, and should be melted in the mouth rather than swallowed.