Research
Mixed
Telomere length is not a validated, universal biomarker of human aging because current evidence is equivocal, inconsistent across studies, and fails to predict mortality or functional decline better than chronological age.
Do not rely on telomere length testing as a definitive measure of your biological age or life expectancy. Current scientific consensus indicates the evidence is too mixed and inconsistent to be useful for individual prediction. Focus on established health markers instead.
GoodRefutesHIGH confidence
Although telomere length is implicated in cellular aging, the evidence suggesting telomere length is a biomarker of aging in humans is equivocal.
Why this rating
It is a systematic review of 19 human studies with sample sizes >100, providing high-quality aggregate evidence, despite the mixed results of individual studies.
Source
Is Telomere Length a Biomarker of Aging? A Review
Karen A. Mather et al. · The Journals of Gerontology Series A · 2010
DOI 10.1093/gerona/glq180
narrative_reviewCited 446×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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