Introduction
The ETG (Ethyl Glucuronide) test is a highly sensitive alcohol detection test that can identify recent alcohol use. But simply getting the result isn’t enough — understanding what your ETG report means is equally important. This guide will walk you through how to read and interpret ETG test results correctly.
1. What is an ETG Test?
- ETG is a metabolite that forms when your body processes alcohol.
- It can be detected in urine, blood, and hair.
- The ETG urine test is the most common and can detect alcohol use for up to 24–80 hours after consumption.
2. Positive vs. Negative Results
- Positive Result → ETG is detected in your system, indicating alcohol use or exposure.
- Negative Result → No detectable ETG, meaning no alcohol has been identified within the test’s detection window.
3. Understanding Cutoff Levels
ETG test cutoff levels determine how results should be interpreted:
- Low Cutoff (100–200 ng/mL): Very sensitive, may detect small exposures like mouthwash or hand sanitizers.
- Standard Cutoff (500 ng/mL): Commonly used in testing programs; minimizes incidental exposure detection.
- High Cutoff (1000 ng/mL+): Detects only actual drinking, ignores minor incidental exposures.
4. Factors That Can Affect ETG Results
- Incidental exposure: Products like hand sanitizers, mouthwash, and certain medications.
- Metabolism: Everyone’s body processes alcohol differently.
- Time since last drink: The longer it’s been, the lower the ETG level.
- Hydration: Drinking more water can dilute urine and lower ETG concentration.
5. Why Context Matters
- A positive result does not always mean heavy drinking.
- A negative result doesn’t always mean completely alcohol-free (if testing was done after the detection window).
- Professionals must consider cutoff levels, timing, and lifestyle factors before interpreting results.
6. When to Consult a Professional
- If your test shows unexpected results.
- If you believe a false positive came from incidental exposure.
- If ETG testing is part of legal, employment, or medical requirements.
Conclusion
The ETG test is a valuable tool for detecting alcohol use, but results must be interpreted in the proper context. Positive or negative findings are only part of the picture cutoff levels, timing, and professional guidance all play a role in understanding your ETG results.