🗓️ Updated: May 2026 🏷️ Midrand Medical Centre There is growing interest in the link between blood sugar levels and long-term brain health. Researchers are increasingly finding that diabetes, chronic hyperglycaemia, hypoglycaemia, and even glucose variability can all affect the brain in different ways. That does not mean every person with high blood sugar will develop memory problems, but it does mean that blood sugar is now seen as part of the bigger brain-health picture rather than something that matters only to the pancreas or circulation. On this page What the research is showing How high blood sugar may affect the brain Brain health is connected to whole-body health What this means in everyday life Closing thoughts What the research is showing The American Diabetes Association’s 2025...