B-12, Alzheimer's linked again

Both serum homocysteine (tHcy), an amino acid associated with vitamin B12, and holotranscobalamin (holoTC), the biologically active fraction of vitamin B12, may have a role in the development of Alzheimer's disease (AD). Among a group of elderly subjects followed up for 7 years, elevated baseline serum tHcy concentrations were independently associated with an increased risk of developing AD, whereas higher baseline holoTC values were independently related to a reduced risk for incident AD. The results were published in Neurology.