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Kidney tests and minerals
Explore creatinine, eGFR, electrolytes and the minerals reported alongside them.
Explore kidney & minerals
Creatinine, eGFR and urea: one measured, the others worked out from it
A kidney panel prints a waste product, an estimate derived from it, and a second waste product measured separately. Which is which, and why eGFR can move when creatinine doesn't.
Read the guideCreatinine
Reported in mg/dL · µmol/L.
Sodium, potassium, chloride — and the minerals reported beside them
Electrolytes are minerals carrying an electrical charge, reported as a tight group. Why they are read together rather than one at a time, and what calcium, magnesium and phosphorus are doing on the same page.
Urea
Reported in mg/dL · mmol/L.
BUN
Reported in mg/dL · mmol/L.
Uric Acid
Reported in mg/dL · µmol/L.
eGFR
Reported in mL/min/1.73m².
BUN/Creatinine Ratio
Reported in ratio.
Sodium
Reported in mEq/L.
Potassium
Reported in mEq/L.
Chloride
Reported in mEq/L.
Calcium
Reported in mg/dL.
Magnesium
Reported in mg/dL.
Phosphorus
Reported in mg/dL.
Reading the report
What the H and L flags on a lab report actually assert
A flag compares your number to the range printed beside it on that page — nothing more. What it does not tell you, and why healthy people collect them.
Why the same blood test has different "normal" ranges at different labs
Reference intervals are built from each lab's own population and equipment, which is why two labs can print different ranges for the same sample.