Scientists say they have identified a possible genetic link between diabetes and Alzheimer's disease.
It has been known for some time that people with diabetes have a much higher risk of developing Alzheimer's, but not why this is so.
Now US researchers writing in Genetics say a study of worms has indicated a known Alzheimer's gene also plays a role in the way insulin is processed.
Dementia experts said more work in humans was now needed.
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