BOSTON / LONDON (IT BOLTWISE) – A new long-term study from Boston University shows that high levels of vitamin B12 can significantly slow mental decline in old age. The results of the Framingham Heart Study underscore the importance of vitamin B12 in maintaining cognitive abilities, particularly in the areas of memory, planning and language. Experts are now calling for a revision of the medical limits for vitamin B12 in order to improve brain protection.
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The importance of vitamin B12 for maintaining mental health in old age is impressively supported by new long-term data. A comprehensive analysis of the Framingham Heart Study, conducted by a research team at Boston University, shows that consistently high levels of vitamin B12 can significantly slow cognitive decline. These findings are particularly relevant for the areas of memory, planning ability and language, in which the protective effect of vitamin B12 can be measured.
The study suggests that current medical limits for vitamin B12 should be revised. Data from the University of California suggests that even older adults with scores in the lower normal range can have neurological deficits. These deficits manifest in slowed thinking speed and, more alarmingly, increased damage to neural pathways in the brain, MRI scans show. This damage is considered an early warning sign of dementia.
Vitamin B12 fulfills a double protective function for the brain. It is essential for the formation of the myelin sheaths, which insulate the nerve fibers and thus accelerate the transmission of stimuli. A lack of vitamin B12 can make this insulation fragile and slow down the transmission of stimuli. In addition, vitamin B12 breaks down the harmful amino acid homocysteine, whose elevated levels are considered a risk factor for Alzheimer’s and vascular damage in the brain.
Seniors, people with gastrointestinal diseases or those who take certain medications, as well as vegans and vegetarians are particularly at risk of an undetected vitamin B12 deficiency. A more precise test, the holotranscobalamin test, can help determine active, usable vitamin B12 levels and thus detect a deficiency at an early stage. The study situation increases the pressure on health authorities to adjust the reference values in order to improve protection of the brain.
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