What to watch with DNA Stoffwechseltest and longevity?

When interpreting a DNA metabolism test (e.g., TCF7L2, ADIPOQ, FTO) in the context of longevity, caution is warranted. These variants typically have small effect sizes and are not deterministic. For instance, TCF7L2 (rs7903146) modestly increases type 2 diabetes risk, but lifestyle factors like diet and exercise matter more. ADIPOQ variants influence adiponectin, yet lifestyle and weight management have stronger effects. FTO is often linked to weight, but evidence for gene-based diet personalization is weak. Longevity-related genes such as SIRT1 (rs12778366) show GWAS associations with metabolic syndrome, but no direct link to endurance or lifespan. Marketing often overstates the relevance of such markers. Instead, rely on a comprehensive approach: lab tests (e.g., CGM, blood lipids) and proven lifestyle interventions (Mediterranean diet, physical activity). For children, DNA tests for metabolism and longevity are not recommended due to low predictive value and ethical concerns. In summary, treat these results with skepticism and do not base major dietary or lifestyle changes solely on them.