"Vitamin B12 status and rate of brain volume loss in community-dwelling elderly." by Vogiatzoglou A1, Refsum H, Johnston C, Smith SM, Bradley KM, de Jager C, Budge MM, Smith AD., published in Neurology. 2008 Sep 9;71(11):826-32. doi: 10.1212/01.wnl.0000325581.26991.f2.
(after @shashiiyengar Twitter post)
(Sorry for not being able to post any comments figures or quotes, the original paper is paywalled!)
