creatinine
Muscle waste product
Creatinine is a chemical waste product in the blood, formed when muscles break down creatine during normal activity.
The kidneys filter creatinine from the blood and excrete it in urine.
Blood creatinine levels serve as a standard measure of kidney function—elevated levels suggest the kidneys aren't filtering efficiently: Her creatinine was high, so they ordered more tests.
kidney
Blood-filtering organ
- filtrationSeparating solids from liquids
- GFRKidney filtration measurement
- serumBlood's watery portion
clearance · biomarker · renal · urine · metabolite · muscle · waste · blood · nitrogen · excretion
- medical testsblood test, blood tests, CT scan, X-ray, urine tests
- Biochemicalsamino acid, amino acids, protein, proteins, DNA
- blood testsCBC, blood test, complete blood count, blood work, CMP
- excretionurine, urea, feces, uric acid, urination
- excretory systemkidney, kidneys, bladder, urinary bladder, urethra
- health datablood pressure, heart rate, pulse, weight, height
metabolic precursor vs. waste product
creatininecreatine
Muscle energy compound
nutrients · ATP · amino acids · glucose · arginine
- creatinine clearanceKidney waste-removal efficiency measure