Blood Type May Influence Risk of Cognitive Decline, Alzheimer’s

Individuals with type 'O' blood had more grey matter, thought to stave off cognitive decline, in their brains than other blood types.

A pioneering study conducted by leading researchers at the University of Sheffield has revealed blood types play a role in the development of the nervous system and may cause a higher risk of developing cognitive decline.

The research, carried out in collaboration with the IRCCS San Camillo Hospital Foundation in Venice, shows that people with an ‘O’ blood type have more grey matter in their brain, which helps to protect against diseases such as Alzheimer’s, than those with ‘A’, ‘B’ or ‘AB’ blood types.

Research fellow Matteo De Marco and Professor Annalena Venneri, from the University’s Department of Neuroscience, made the discovery after analyzing the results of 189 Magnetic Resonance Imaging (MRI) scans from healthy volunteers.

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