Vitamin B12 Keeps Your Brain Young
September 23, 2008
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Older individuals with low levels of vitamin B12 are at increased risk of having brain atrophy or shrinkage. Brain atrophy is associated with Alzheimer's disease and impaired cognitive function.
Vitamin B12 deficiency is a public health problem, especially among older people.
In a study involving more than 100 volunteers aged 61 to 87, all participants underwent annual clinical exams, MRI scans and cognitive tests, and had blood samples taken. Individuals with lower vitamin B12 levels at the start of the study had a greater decrease in brain volume. Those with the lowest B12 levels had a sixfold greater rate of brain volume loss compared with those who had the highest levels.
However, none of the participants were actually deficient in vitamin B12 -- they just had low levels within a normal range.
Other risk factors for brain atrophy include high blood pressure, diabetes and high cholesterol.
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