'''Biomarkers of aging''' <ref name="Biomarkers of aging"/> are biomarkers that better predict functional capacity at a later age than chronological age. Stated another way, biomarkers of aging would give the true "biological age", which may be different from the chronological age.
Validated biomarkers of aging would allow for testing interventions to extend lifespan, because changes in the biomarkers would be observable throughout the lifespan of the organism. Although maximum lifespan would be a means of validating biomarkers of aging, it would not be a practical means for long-lived species such as humans because longitudinal studies would take far too much time. Ideally, biomarkers of aging should assay the biological process of ageing and not a predisposition to disease, should cause a minimal amount of trauma to assay in the organism, and should be reproducibly measurable during a short interval compared to the lifespan of the organism.
The epigenetic clock is a promising biomarker of aging.
== References ==
<references>
<ref name="Biomarkers of aging">[http://www.new-ag.info/en/country/profile.php?a=844 Country profile: Samoa, New Agriculturist Online new-agri.co]</ref>
</references>
[[Category:Physiology]]