This article presents a conceptual discussion of some aspects involved in biomarkers in
aging. A biomarker of aging is a biological parameter of an organism that either alone or in
some multivariate composite will, in the absence of disease, better predict functional
capability at some late age than will chronological age. The reasons for undertaking
biomarker research, criteria for putative biomarkers, measurement and assessment of
putative biomarkers, and the new initiative by the National Institute on Aging in biomarker …