A new study has discovered that elevated blood sugar levels can adversely affect brain health, even in people without diabetes. While the connection between blood sugar and brain function is well documented among individuals with diabetes, this research is the first to explore this connection in those without the condition. The findings suggest that high blood sugar levels can detrimentally affect brain health, even in individuals who have not been diagnosed with diabetes.
Glucose serves as the main fuel for the brain, meaning that changes in these levels can significantly influence cognitive abilities. Without necessarily being diagnosed with diabetes, sustained high blood sugar can adversely affect cognitive health. This may result in reduced cognitive capabilities, weakened memory, and a heightened risk of developing dementia.
The study involved 146 adults over the age of 18, all in good health. For each participant, researchers assessed blood glucose levels, monitored brain activity with MRI scans, and measured heart rate variability through electrocardiogram tests.
Elevated blood sugar levels were linked to reduced connectivity in brain networks that are essential for various cognitive functions, such as memory, attention, and the regulation of emotions. The impact was more pronounced in older adults, although it was observed across all age groups and women were significantly higher than men. Furthermore, a correlation was found between elevated blood sugar and diminished variability in heart rate. Previous studies suggest that greater variability in heart rate is linked to improved brain health.
Going forward, researchers could look into methods of boosting brain function by adjusting heart rate variability. This would be an easier target for intervention compared to managing blood sugar, especially in those who are not diabetic.
To view the original scientific study click below:
The associations among glycemic control, heart variability, and autonomic brain function in healthy individuals: Age- and sex-related differences
