The Study
A Targeted Epigenetic Clock for the Prediction of Biological Age
This study is like taking a picture of many people at one moment in time and comparing their epigenetic 'age markers' to see if they match what we expect from their real age and health conditions. It can show that people with Down syndrome tend to have higher epigenetic age markers, and very old people tend to have lower ones - kind of like how a car's mileage meter might show more or less wear than the actual miles driven. But because it's just a snapshot, we can't prove that these markers actually cause aging or can tell any single person exactly how fast they're aging.
Analysis score
Maximum 44 for a cross-sectional study.
Where the score came from
Scientists created a blood test using 6 specific genetic markers (from genes like ELOVL2 and SIRT7) to measure your biological age - how old your body really is, not just your birthday age. They tested it on nearly 1,000 people including healthy adults, people with Down syndrome (who age faster), and supercentenarians (who age slower).
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 544 / 100
Quality score
Snapshots of a population at a single point in time, or descriptions of small groups. Can identify correlations and prevalence, but cannot determine cause and effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes, this is significant for humans.
- 2A 4-year error margin means the test can reasonably estimate biological age, which matters because biological age (not just chronological age) predicts health outcomes and longevity.
- 3However, claims of large age reversals (like 8 years) should be viewed skeptically given this error margin.
- 4The test matched chronological age very well (89% correlation) with an average error of about 4 years.
- 5It correctly showed people with Down syndrome as biologically older, and centenarians as biologically younger than their actual age.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Cells
Year
2022
Authors
Noémie Gensous, C. Sala, C. Pirazzini, F. Ravaioli, M. Milazzo, K. Kwiatkowska, E. Marasco, S. De Fanti, C. Giuliani, Camilla Pellegrini, A. Santoro, M. Capri, S. Salvioli, Daniela S. Monti, G. Castellani, C. Franceschi, M. Bacalini, P. Garagnani
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Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.