Ethyl glucuronide (EtG) in urine

Why This Test Matters

EtG is a specific marker for alcohol metabolism. Unlike traditional tests that rely on blood or breath alcohol levels, EtG can identify alcohol use up to 80 hours (3.3 days) after consumption, making it useful for screening for recent drinking, especially in cases where other tests may not detect alcohol anymore.

How the Test Works

The test uses a specialized method (likely immunoassay or chromatography) to detect EtG in your urine. This metabolite forms when your body breaks down alcohol, and it stays in the urine longer than alcohol itself.

Sample Collection and Preparation

You’ll provide a urine sample, typically collected in a sterile container. The lab processes the sample to measure EtG levels accurately. This test is often used in screening or confirmation settings, such as workplace drug testing or medical evaluations.

What the Results Mean

Results are reported as a concentration of EtG in micrograms per milliliter (µg/mL). A positive result indicates recent alcohol use, but interpretation depends on clinical context (e.g., timing since last drink, purpose of testing). Consult your healthcare provider for guidance.