https://longevitydecisionguide.com/ What the evidence supports in longevity screening and healthspan interventions — graded, sourced, and with the uncertainty stated rather than smoothed over.en https://longevitydecisionguide.com/articles/absolute-versus-relative-risk/ https://longevitydecisionguide.com/articles/absolute-versus-relative-risk/A hypothetical worked example shows why a percentage reduction needs a baseline risk, a defined outcome and a time frame before it becomes useful. Mon, 12 Oct 2026 00:00:00 GMT https://longevitydecisionguide.com/articles/biological-age-clock-versus-clinical-benefit/ https://longevitydecisionguide.com/articles/biological-age-clock-versus-clinical-benefit/A change in an aging marker is not, on its own, proof of extra healthy years. Separate the measurement, its intended use and the clinical outcome it is supposed to predict. Thu, 22 Oct 2026 00:00:00 GMT https://longevitydecisionguide.com/articles/how-to-read-a-longevity-tests-evidence/ https://longevitydecisionguide.com/articles/how-to-read-a-longevity-tests-evidence/Record the claim, study population, comparison, outcomes and harms before deciding what the evidence does and does not establish. Mon, 12 Oct 2026 00:00:00 GMT https://longevitydecisionguide.com/articles/screening-versus-diagnostic-testing/ https://longevitydecisionguide.com/articles/screening-versus-diagnostic-testing/The purpose of a test changes the evidence it needs. Compare screening, investigation of symptoms and follow-up of an abnormal result before evaluating a claim. Mon, 12 Oct 2026 00:00:00 GMT https://longevitydecisionguide.com/articles/whole-body-mri-without-symptoms/ https://longevitydecisionguide.com/articles/whole-body-mri-without-symptoms/Whole-body MRI can detect abnormalities, but detection alone does not establish a health benefit. A source-based review of incidental findings, follow-up and uncertainty. Fri, 18 Sep 2026 00:00:00 GMT