Creatinine

A waste product cleared by the kidneys; used to judge kidney function.

If it's high

Can point to reduced kidney function, dehydration, or high muscle mass.

• Enough water through the day, unless your doctor has asked you to limit fluids

If it's low

Often reflects lower muscle mass.

A question for your doctor

What is my eGFR, and is this a change from before?

All test guides · Track your results free with MyVitalLedger