When blood sugar stays too high for a long time, it specifically damages the cells that make insulin and the cells that line your blood vessels. This damage is exactly why diabetes stops your body from making enough insulin and causes serious blood vessel problems that harm your organs.

What we have found so far points to a clear pattern in how long-term high blood sugar affects the body. Our current analysis shows that the evidence we have reviewed leans toward the idea that sustained high glucose levels can harm the cells responsible for producing insulin and the cells that line your blood vessels [1]. Based on what we have reviewed, keeping blood sugar elevated over extended periods appears to stress these specific tissues. The damage to insulin-producing cells may reduce your body's ability to manage glucose effectively. At the same time, harm to the blood vessel lining can lead to circulation issues that may affect various organs. We have not yet seen enough research to map out every step of this process or to confirm how quickly these changes happen. The evidence we have reviewed leans toward a connection between prolonged high blood sugar and these cellular changes, but we are still gathering more data to understand the full picture. The numbers we are working with show 1 studies support, 0 studies refute. We will continue to track new research as it becomes available. For now, the evidence we have reviewed suggests that managing blood sugar levels may help protect these sensitive cells and maintain healthier circulation. Keeping your glucose levels in a stable range through daily habits could be a practical way to support your body's natural systems while we learn more.