Treatments and supplements · Biological age tests (DNA methylation etc.)

Can a test actually tell me my real biological age?

What we can tell you today: how thoroughly this has been studied.

Thoroughly studied

8 studies, of which 7 bring together the results of several trials in people. This is as strong as evidence gets.

5 Repeated evidence 7 studies

4 Large controlled trial 1 study

This says how thoroughly something has been studied — not whether it works for you. What each study actually found is in the study itself, and in the plain-language write-ups we are adding.

Appears under: Living longer in good health

The studies

5 Repeated evidence DNA methylation-based measures of biological age: meta-analysis predicting time to death.
2017 · Aging
5 Repeated evidence Methods for the assessment of biological age - A systematic review.
2025 · Maturitas
5 Repeated evidence Proteomic Markers of Aging and Longevity: A Systematic Review.
2024 · International journal of molecular sciences
5 Repeated evidence What can we learn from physical capacity about biological age? A systematic review.
2022 · Ageing research reviews
5 Repeated evidence Telomere length behaves as biomarker of somatic redundancy rather than biological age.
2013 · Aging cell
5 Repeated evidence Contribution of Biological Age-Predictive Biomarkers to Nutrition Research: A Systematic Review of the Current Evidence and Implications for Future Research and Clinical Practice.
2022 · Advances in nutrition (Bethesda, Md.) · 5,043 participants
4 Large controlled trial The effect of polyphenols on DNA methylation-assessed biological age attenuation: the DIRECT PLUS randomized controlled trial.
2023 · BMC medicine · 256 participants · manufacturer helped fund this
5 Repeated evidence Inter-individual exposure variability interpretation through reflection of biological age algorithm in physiologically based toxicokinetic model: Application to human risk assessment of di-isobutyl-phthalate.
2023 · Environmental pollution (Barking, Essex : 1987)