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Patient guide · Kidney health

Protein in the urine: what albuminuria means

Albumin or protein in the urine can be a marker of kidney damage. The amount, persistence, associated findings and overall health determine what it means for an individual.

Understanding the test

Why clinicians look for urine albumin

Healthy kidneys normally limit the amount of albumin that passes into urine. Detecting increased albumin or protein can help identify kidney damage, estimate future kidney and cardiovascular risk, and guide follow-up.

Why repeat testing may be needed

Urine results can be influenced by temporary circumstances such as acute illness, vigorous exercise or other clinical factors. A clinician may repeat the test and interpret it alongside kidney function, urinalysis, blood pressure and medical history.

Common clinical contexts

Albuminuria can occur with diabetes, high blood pressure and several other kidney conditions. It is not a diagnosis by itself and does not automatically mean kidney failure. The pattern, degree and change over time help determine the next steps.

For referring clinicians: including dated urine albumin-to-creatinine or protein-to-creatinine results, urinalysis, eGFR trend, blood pressure, medication list and relevant serology or imaging can support efficient triage.

What a review may consider

Assessment may include confirmation of persistence, review of medications and health conditions, blood-pressure management, evaluation for associated blood in the urine, and further investigation when the pattern suggests another kidney disorder.

What patients can prepare

Bring an up-to-date medication and supplement list, home blood-pressure readings if requested, and information about diabetes, cardiovascular disease, previous kidney problems or recent illness.

Evidence reviewed July 2026. General education only; testing and treatment decisions are individualized.

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Referring clinicians may submit relevant clinical information through the clinic’s referral pathway.

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