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Also reported in: mmol/L
A normal urine creatinine is consistent with the sample is adequately concentrated to provide reliable results for other urine markers. The kidneys are concentrating creatinine normally as they process urine, which is a basic function that remains intact until kidney disease is moderate to noticeable.
A very low urine creatinine concentration below 20 mg/dL indicates an very dilute urine sample. This can occur with excessive fluid intake, diabetes insipidus, or certain kidney disorders affecting concentrating ability. Very dilute urine can make spot urine tests (like urine albumin) unreliable, as the concentration of other substances is artificially reduced.
Results from other simultaneous urine tests may need to be interpreted cautiously or repeated with a more concentrated sample. Discuss with your doctor.
Urine Creatinine: {{value}} {{unit}} — very low (ref: {{low}}–{{high}})A low urine creatinine indicates dilute urine, typically from high fluid intake, certain diuretics, or early kidney concentrating dysfunction. Urine creatinine is primarily used as a reference point to normalize other urine markers (like albumin) — a low value means those results should be interpreted as an albumin-to-creatinine ratio rather than as raw concentrations.
Not typically a standalone concern. Ensure the albumin-to-creatinine ratio (ACR) is used when evaluating urine protein levels.
Urine Creatinine: {{value}} {{unit}} — low (ref: {{low}}–{{high}})Borderline low urine creatinine typically reflects higher water intake or moderate dilution of urine. While this does not directly indicate kidney disease, it means other urine concentration-dependent tests may be slightly diluted. The albumin-to-creatinine ratio corrects for this dilution effect.
No specific concern. Use ACR to normalize protein measurements from this sample.
Urine Creatinine: {{value}} {{unit}} — borderline low (ref: {{low}}–{{high}})A normal urine creatinine is consistent with the sample is adequately concentrated to provide reliable results for other urine markers. The kidneys are concentrating creatinine normally as they process urine, which is a basic function that remains intact until kidney disease is moderate to noticeable.
Good result. Normal urine creatinine ensures other urine markers in this sample are interpretable and reliable.
Urine Creatinine: {{value}} {{unit}} — normal (ref: {{low}}–{{high}})An optimal urine creatinine concentration means the kidneys are concentrating urine at a healthy rate, and all co-tested urine markers (albumin, glucose, etc.) are fully reliable for interpretation. This mid-range concentration is ideal for diagnostic accuracy of spot urine tests.
Good result. Optimal urine creatinine is consistent with the sample quality for all other urinary markers tested.
Urine Creatinine: {{value}} {{unit}} — optimal (ref: 60–250)A borderline high urine creatinine means the urine is slightly concentrated, which can occur with mild dehydration or reduced fluid intake. It is not typically a sign of kidney disease but can mildly amplify the apparent concentration of other urine markers, potentially making them look higher than their true corrected levels.
Increase fluid intake. If testing other urine markers, use the ACR ratio to correct for concentration.
Urine Creatinine: {{value}} {{unit}} — borderline concentrated (ref: {{low}}–{{high}})High urine creatinine concentration indicates very concentrated urine, most commonly from dehydration or inadequate fluid intake. The kidneys are conserving water by concentrating the urine heavily. While not itself a sign of kidney disease, the raw concentrations of other urine markers will be amplified and should be evaluated as ratios rather than absolute values.
Drink more water. If this is a first-morning specimen or if dehydration is suspected, retest with proper hydration to get accurate results.
Urine Creatinine: {{value}} {{unit}} — highly concentrated (ref: {{low}}–{{high}}; high: >300)An very high urine creatinine above 400 mg/dL indicates either noticeable dehydration, a highly concentrated first-morning sample, or possibly a collection method issue. This level of concentration can noticeably exaggerate other urine marker readings. Other urine test results from this sample should be interpreted as ratios only.
Ensure good hydration before retesting. Discuss with your doctor if noticeable dehydration or unusual kidney concentrating behavior is suspected.
Urine Creatinine: {{value}} {{unit}} — very concentrated (ref: {{low}}–{{high}}; critical: >400)Upload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.