Myths vs facts: Nährstoffcheck and Langlebigkeit

The myth that a simple nutrient check (e.g., from saliva or blood) directly translates to increased longevity is not supported by robust science. While certain biomarkers like vitamin D, ferritin, or omega-3 index can indicate deficiencies linked to disease risk, the causal chain from a single nutrient level to lifespan extension is complex and confounded by inflammation, genetics, and lifestyle. Many commercial tests use non-validated reference ranges or extrapolate from epidemiological data that do not allow personalized prediction. Moreover, randomized controlled trials demonstrating that correcting a measured nutrient deficit alone significantly extends lifespan are lacking. The evidence is therefore 'mixed': strong for the importance of overall balanced nutrition, but weak to absent for the efficacy of direct-to-consumer nutrient checks as anti-aging interventions. Safety note: high doses of single nutrients (e.g., vitamin A, selenium) can be toxic. Medical evaluation before supplementation is recommended.