Increased blood sugar levels are associated with cognitive decline

Recently a long term study has found that a rise in blood sugar levels was tied to memory decline.

Researchers assessed cognitive function in 5,189 people, average age of 66 and had tested their blood sugar levels using HbA1c, a test that accurately measures blood glucose levels over weeks or months. They had followed the group for upto 10 years, tracking blood glucose levels and periodically testing cognitive ability. The study is In the journal Diabetologia. 

There was no association between blood sugar levels and cognitive at the start of the study. 

But consistently over time, scores on the tests of the memory and executive function declined as HbA1c levels increased, even in people without diabetes. 

The study's lead author, Wuxiang Xie, a researcher at the Peking university health science centre, said that the underlying mechanism is still unknown.