In Today's health matters, people with diabetes may be at a greater risk to develop dementia.
Japanese researchers gave more than a thousand adults over sixty a blood glucose test and followed up with them over eleven years.
They found diabetics were twice as likely to develop dementia as people with normal blood sugar levels.
The results remained the same even after researchers accounted for factors such as high blood pressure and smoking.
Dementia risk was also high in people diagnosed with a condition called "pre-diabetes."
Findings appear in the journal 'Neurology.'