All American Senior Care Weblog: Alzheimer's Reading Room: Vitamin B12 May Protect Against Brain Shrinkage in Old Age

These findings should be of special interest to baby boomers now entering their 60s.

A study conducted by researchers at the Oxford Project to Investigate Memory and Ageing (OPTIMA) found that people with higher levels of vitamin B12 were six times less likely to experience brain volume loss. Vitamin B12, a nutrient found in meat, fish and milk, may protect against brain volume loss in older people. The researchers studied 107 volunteers age 61 to 87 who did not have cognitive impairment when they volunteered. The volunteers underwent yearly MRI brain scans, cognitive and memory tests and physical exams for five years.

This study suggests that simply adjusting our diets to consume more vitamin B12 through eating meat, fish, fortified cereals or milk may be something we can easily adjust to prevent brain shrinkage and so perhaps save our memory, says Anna Vogiatzoglou of the Department of Physiology, Anatomy and Genetics at Oxford University. Research shows that vitamin B12 deficiency is a public health problem, especially among the elderly, so more vitamin B12 intake could help reverse this problem. Without carrying out a clinical trial, we acknowledge that it is still not known whether B12 supplementation would actually make a difference in elderly persons at risk for brain shrinkage.

Vitamin B12 may protect the brain in old age

Vitamin B12, a nutrient found in meat, fish and milk, may protect against brain volume loss in older people, according to a University of Oxford study.

For the study, 107 people between the ages of 61 and 87 underwent brain scans, memory testing and physical exams. The researchers from the Oxford Project to Investigate Memory and Ageing (OPTIMA) also collected blood samples to check vitamin B12 levels. Brain scans and memory tests were also performed again five years later.

The study, published in the journal Neurology, found that people who had higher vitamin B12 levels were six times less likely to experience brain shrinkage compared with those who had lower levels of the vitamin in their blood. None of the people in the study had vitamin B12 deficiency.

Many factors that affect brain health are thought to be out of our control, but this study suggests that simply adjusting our diets to consume more vitamin B12 through eating meat, fish, fortified cereals or milk may be something we can easily adjust to prevent brain shrinkage and so perhaps save our memory,” says Anna Vogiatzoglou of the Department of Physiology, Anatomy and Genetics at Oxford University. “Research shows that vitamin B12 deficiency is a public health problem, especially among the elderly, so more vitamin B12 intake could help reverse this problem. Without carrying out a clinical trial, we acknowledge that it is still not known whether B12 supplementation would actually make a difference in elderly persons at risk for brain shrinkage.”

Previous research on the vitamin has had mixed results and few studies have been done specifically with brain scans in elderly populations. We tested for vitamin B12 levels in a unique, more accurate way by looking at two certain markers for it in the blood,” adds Ms Vogiatzoglou.

Ms Vogiatzoglou says the study did not look at whether taking vitamin B12 supplements would have the same effect on memory.

The study was supported by the UK Alzheimer’s Research Trust, the Medical Research Council, the Charles Wolfson Charitable Trust, the Norwegian Foundation for Health and Rehabilitation through the Norwegian Health Association, Axis-Shield plc and the Johan Throne Holst Foundation for Nutrition Research.

For more information please contact Professor David Smith on david.smith@pharm.ox.ac.uk

Or the Press Office, University of Oxford, 01865 280528, press.office@admin.ox.ac.uk.

* OPTIMA, the Oxford Project to Investigate Memory and Ageing, is tackling one of the great medical and social challenges of our time: the diseases of the ageing brain. It aims to deepen our understanding of the changes that occur in the brain as we age, in a longitudinal study of normal volunteers and patients with memory problems. In revealing the differences between normal brain ageing and diseases like Alzheimer's disease, OPTIMA will lay the foundations for the development of new forms of prevention and treatment. http://www.medsci.ox.ac.uk/optima

* Oxford University’s Medical Sciences Division is one of the largest biomedical research centres in Europe. It represents almost one-third of Oxford University’s income and expenditure, and two-thirds of its external research income. Oxford’s world-renowned global health programme is a leader in the fight against infectious diseases (such as malaria, HIV/AIDS, tuberculosis and avian flu) and other prevalent diseases (such as cancer, stroke, heart disease and diabetes). Key to its success is a long-standing network of dedicated Wellcome Trust-funded research units in Asia (Thailand, Laos and Vietnam) and Kenya, and work at the MRC Unit in The Gambia. Long-term studies of patients around the world are supported by basic science at Oxford and have led to many exciting developments, including potential vaccines for tuberculosis, malaria and HIV, which are in clinical trials.