Myths vs facts: Cortisol senken and Blutzucker

Cortisol, the primary stress hormone, raises blood glucose by stimulating hepatic gluconeogenesis and reducing insulin sensitivity. A common myth is that cortisol can be lowered quickly with supplements or single nutrients – evidence for most such products is weak. Fact: Chronic cortisol elevation (from stress, poor sleep, overtraining) is linked to higher fasting glucose and HbA1c. Randomized trials show that stress management, moderate exercise, and sleep hygiene effectively lower cortisol and improve glycemic control. Another myth: A DNA test can tell you exactly how cortisol affects your blood sugar. In reality, genes like TCF7L2 (strongly linked to type 2 diabetes) or NR3C1 have modest effect sizes; lifestyle and environment are far more influential. Home cortisol tests (saliva) can track trends but are not diagnostic. Bottom line: Sustainable cortisol and blood sugar management requires evidence-based lifestyle changes – not quick fixes or overinterpreted genetic data.