Kidney function (eGFR, cystatin C)
FoundationalTrack in Cellar· yearly
What it measures
How well the kidneys filter blood, estimated from creatinine (eGFR) and sometimes cystatin C.
Why it's discussed for longevity
A routine organ check; cystatin C is sometimes added for a second estimate.
Source: MedlinePlus (NIH)Related tests in this area
- Liver enzymes (ALT, AST, GGT)Enzymes that describe how the liver is doing.…
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- FIB-4 liver fibrosis indexA calculation from age, AST, ALT, and platelet count used to…
- Liver elastography (FibroScan)Liver stiffness, measured with a quick ultrasound-based scan…