Why stressed rats have low insulin but their pancreas works harder
Effect of chronic psychological stress on insulin release from rat isolated pancreatic islets.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Rats were stressed by being stuck in small spaces for two weeks or a month. Their blood sugar went up at first, but their insulin levels dropped. When scientists took out their pancreas cells and gave them lots of sugar, the cells released more insulin than normal.
Surprising Findings
Insulin release from islets increased significantly at 16.7 mM glucose on day 30, despite fasting insulin being lower than controls.
Common belief: chronic stress → beta-cell burnout → less insulin. This study shows the opposite—beta-cells are hyper-responsive in a dish, meaning the problem isn’t the pancreas, it’s the body’s control system.
Practical Takeaways
If you're chronically stressed and your blood sugar is off, it might not be because your pancreas is broken—something in your nervous system or stress response could be blocking insulin release.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Rats were stressed by being stuck in small spaces for two weeks or a month. Their blood sugar went up at first, but their insulin levels dropped. When scientists took out their pancreas cells and gave them lots of sugar, the cells released more insulin than normal.
Surprising Findings
Insulin release from islets increased significantly at 16.7 mM glucose on day 30, despite fasting insulin being lower than controls.
Common belief: chronic stress → beta-cell burnout → less insulin. This study shows the opposite—beta-cells are hyper-responsive in a dish, meaning the problem isn’t the pancreas, it’s the body’s control system.
Practical Takeaways
If you're chronically stressed and your blood sugar is off, it might not be because your pancreas is broken—something in your nervous system or stress response could be blocking insulin release.
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When male rats are stressed out for a couple of weeks, their stress hormone levels spike after 15 days—but by 30 days, their bodies have adjusted and the hormone levels go back down.
When male rats are stressed by being stuck in a small space for an hour, twice a day, for two weeks or a month, their bodies produce less insulin—even though their blood sugar goes up. This suggests their pancreas isn’t releasing insulin properly.
When male rats are stressed out for a month by being stuck in small tubes, their pancreas cells become super sensitive to sugar and pump out way more insulin than normal when tested in a dish.