Microalbumin: What Your Result Means
Result guide · Kidney
Content last reviewed 2026-09-12 · Educational information — not medical advice
Quick answer
Microalbumin is a tiny amount of the protein albumin leaking into urine — the earliest warning sign that the kidney's filter is being damaged. It is the key screening test for diabetic kidney disease.
What is Microalbumin?
Healthy kidneys keep albumin out of urine almost completely. Microalbumin detects the small amounts that slip through when the filter begins to fail — long before a routine urine test turns positive. Because it rises early, it gives doctors a head start on protecting the kidneys, typically in diabetes and high blood pressure.
Typical reference interval: Microalbumin is usually reported as a ratio to creatinine in a urine sample. Below roughly 30 mg/g is considered normal; 30–300 mg/g is the warning zone (called moderate or microalbuminuria); above 300 mg/g is overt protein loss.. Laboratories differ — the interval printed on YOUR report always governs.
If your Microalbumin is high
Common reasons Microalbumin runs above the reference interval:
- Early diabetic kidney disease — the most important cause — diabetes damages kidney filters first and microalbumin is how it is caught
- High blood pressure — pressure stress on the kidney filter increases protein leakage
- Exercise or fever — transient rises can occur with heavy exertion or illness — repeat testing sorts this out
- Urinary tract infection — inflammation in the urinary tract can raise albumin artificially
- Other kidney disease — glomerular damage from various causes
If your Microalbumin is low
Common reasons Microalbumin runs below the reference interval:
- No detectable leak — a normal result — the reassuring outcome for most people
- Very dilute or very concentrated urine — an artifactual concern; this is why the albumin-to-creatinine ratio is preferred over a bare albumin number
Symptoms worth knowing
Microalbumin is silent — urine looks and feels completely normal. That silence is exactly why it matters: it catches kidney-filter damage years before symptoms or routine tests would.
What usually happens next
Get your Microalbumin checked
These lab tests measure Microalbumin directly. Ordering online takes a few minutes and results arrive securely.
We may earn a commission when you order through partner links on the following pages. Educational information here never replaces advice from a qualified healthcare provider.
Panels that include this value
Microalbumin appears as one line inside these broader panels — better value than ordering single markers alone:
Related result guides
Frequently asked questions about Microalbumin results
I was told microalbumin is a separate test from regular urine protein — what is the difference?
Microalbumin is far more sensitive. Regular urine protein only turns positive once a lot of protein is leaking; microalbumin catches the small leak long before. That early signal is what makes it the preferred screening test in diabetes.
My microalbumin went up after a hard workout — should I worry?
Transient rises with heavy exercise, fever, or even stress are common and usually mean nothing. Doctors confirm with a repeat sample before drawing conclusions — a single elevated value is rarely a diagnosis.
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