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 . No recommendations can or should be made to doctors or the public regarding use of B vitamins based on this study . Scientists caution that further and larger studies are needed to confirm the benefits .
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 .