Myths vs facts: SHBG and longevity

Myths vs facts about SHBG and longevity: SHBG (sex hormone-binding globulin) is often marketed as a direct longevity marker. Fact: SHBG binds testosterone and estradiol, regulating their bioavailability, and is linked to metabolic health, insulin resistance, and liver function. Observational studies suggest higher SHBG levels are associated with lower all-cause mortality, but the evidence is correlational, not causal. A common myth is that you can deliberately raise SHBG with supplements (e.g., boron, resveratrol) to extend lifespan. In reality, lifestyle factors like weight loss, high-fiber diet, and exercise can modestly increase SHBG, but the direct impact on longevity is indirect and not well-proven. SHBG also varies with age, sex, and disease – a high level is not automatically beneficial. Bottom line: SHBG is an interesting biomarker but not a simple longevity lever. Evidence is moderate (observational); marketing often overstates the case.