Vitamin D could halve the rate of brain shrinkage in those with mild cognitive disabilities . MCI can be a precursor to Alzheimer 's and other forms of cancer . The benefits of certain B drugs are already known . Scientists caution that further and larger studies are needed to confirm the benefits .
Vitamin B could halve the rate of brain shrinkage in those with mild cognitive impairment . MCI can be a precursor to Alzheimer 's and other forms of dementia . The benefits of certain B vitamins are already known . Researchers caution that further and larger studies are needed to confirm the results .