US research suggests a possible link between the rare AB blood type, which occurs in 4% of the population, and memory problems in later life. People with blood group AB and those with higher factor VIII (FVIII), appear more likely to develop thinking and memory problems.
Briggs, H. (2014). Blood group ‘link to memory loss’. London: BBC Health News, September 11th 2014.
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Alexander, KS. Zakai, NA. Gillett, S. [et al] (2014). ABO blood type, factor VIII, and incident cognitive impairment in the REGARDS cohort. Neurology, September 10th 2014, [Epub ahead of print]. (Click here to view the PubMed abstract).