Objective metrics that change the most as we age

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Summary

Aging is accompanied by changes in various bodily metrics, including kidney and liver filtration, red blood cell size, lymphocyte counts, and insulin sensitivity. These changes can be tracked over time using biomarkers such as eGFR, hemoglobin A1c, and others.

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Related coverage

Hacker News Front PageObjective metrics that change the most as we age5/27/2026, 6:15:41 PM

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