"The result is sensational," Professor Helga Refsum, who led the study, told Norway's NRK. "The study offers hope that Alzheimer's disease can be prevented in the same way as other groups of diseases, such as cardiovascular disease and cancer."
The joint study by the University of Oslo and the University of Oxford followed 200 patients over a two-year period, with half of the patients given high doses of B vitamins and the other half placebo tablets.
Scans of the patients' brains made both before and after treatment showed that those who were given the placebo had seven times greater levels of brain dementia than those who were given B vitamins.
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