Professor David Smith at the PAS conference 2013 begins to speak after about 4 minutes about low B12 and brain shrinkage and concludes :
"In the VITACOG trial, raising the median plasma B12 level from
330 to 672 pmol/L
largely prevented the atrophy of Alzheimer's related brain regions. It is clearly very important to maintain a VERY GOOD and not just an adequate, level of B12 ".