SOURCE-BASED EDITORIAL GUIDE · SPECIALIST REVIEW PENDING

What the evidence says

Different biological-age algorithms measure different patterns. In the CALERIE analysis, the intervention affected a pace-of-aging measure without the same result across all age estimates.

Before comparing tests, ask about validation, measurement variability, reference populations and whether the result changes a clinical decision.

THE TAKEAWAY

A change in an aging score is a surrogate result.

Where the evidence stops

A younger estimated age is not proof of added years of life or a diagnosis.

Read the original sources

Source pages checked on 23 October 2026. This is not the publication date of each study. Original sources may be in English.

NIA · CALERIE and biological agingwww.nia.nih.gov · Sources checked: 2026-10-23

Questions worth taking further

  • Was the outcome measured in humans, animals or cells?
  • Does the study population match the people in the claim?
  • What benefits, harms and uncertainties remain unmeasured?