Myths vs facts: SHBG and Langlebigkeit

SHBG (sex hormone-binding globulin) is often linked to longevity, but the evidence is mostly associative and mechanistic. Fact: Higher SHBG levels correlate with lower insulin resistance, better glucose metabolism, and reduced risk of type 2 diabetes – all factors associated with longer lifespan. Myth: SHBG alone is a direct longevity marker. In reality, SHBG is influenced by many factors: liver function, thyroid hormones, estrogen, testosterone, insulin, and inflammation. Low SHBG can indicate metabolic syndrome, fatty liver, or insulin resistance, but it is not necessarily a direct cause of premature aging. Additionally, genetic variants (e.g., in the SHBG gene) can affect SHBG levels independently of health status. Therefore, interpreting a single SHBG value for longevity is limited. It is more meaningful when assessed together with other biomarkers (HbA1c, HOMA-IR, liver enzymes, hormone panel). MyBody-X tests can measure SHBG, but results should not be taken in isolation as a 'longevity indicator.' Evidence: human-moderate (association studies) and mechanistic. No randomized trials directly show that raising SHBG extends lifespan.