Can your blood glucose levels affect your memory?
We know that type 2 diabetes is related to abnormal brain aging.
The following research was investigating how the glycemic load of a diet and blood glucose
were affecting cognition (Seetharaman S, et.al., 2015).
838 healthy adults 50 years old or older were followed for 16 years.
This is what the researchers found.
High blood glucose was related to poorer overall performance on perceptual speed as
well as greater rates of decline in general cognitive ability, perceptual speed and verbal
A high glycemic load diet also played a role which is logical, since eating food which is raising
the blood glucose to a high level will with time result in elevated blood glucose levels.
What about blood glucose levels still in the normal range, but high normal? Can that also be
destructive to the brain?
This study was conducted to determine whether blood glucose levels in the high normal range
were affecting brain volumes, and if this also was associated with cognitive performance
(Mortby ME, et.al., 2013).
210 cognitively healthy individuals 68-73 years old without diabetes, glucose intolerance or
metabolic syndrome was assessed.
Higher blood glucose levels in the normal range were associated with lower grey/white
matter volumes in the frontal cortices.
These findings were also associated with poorer cognitive performance.
Who wants to have a smaller brain?
It’s smart to implement a high nutrient low glycemic index diet as early a possible.
Mortby ME, Janke AL, Anstey KJ, Sachdev PS, Cherbuin N, High “normal” blood glucose is
associated with decreased brain volume and cognitive performance in the 60s: the PATH
through life study. PLoS One. 2013 Sep 4;8(9):e73697.
Seetharaman S, Andel R, McEvoy C, Dahl Aslan AK, Finkel D, Pedersen NL. Blood glucose,
diet-based glycemic load and cognitive aging among dementia-free older adults. J Gerontol A
Biol Sci Med Sci. 2015 Apr;70(4):471-9.