Myths vs facts: Glukose and Langlebigkeit

The claim that blood glucose directly determines lifespan is a myth. The relationship between glucose and longevity is complex and often oversimplified. Chronically elevated glucose (e.g., in diabetes) accelerates aging via glycation and oxidative stress – this is evidence-based (human studies, e.g., HbA1c and mortality). However, many commercial tests claim to derive precise longevity predictions from single glucose values or genetic variants (e.g., GCK, TCF7L2). That is not scientifically sound: effect sizes are small, and lifespan is far more influenced by diet, exercise, and lifestyle. A normal fasting glucose says little about an individual's aging rate. Epigenetic clocks (e.g., GrimAge) show group-level associations with glucose metabolism but are unreliable for individuals (deviations up to 9 years). Bottom line: glucose control is important for healthy aging, but not a direct 'longevity marker'. Beware of marketing that sells simple blood tests as anti-aging miracles.