What is PEth?
- Oct 28, 2025
- 1 min read
Updated: Apr 13
When it comes to monitoring alcohol use, accuracy matters. Traditional tools like self-reports and breathalyzers only tell part of the story. PEth testing fills that gap with science that’s precise, proven, and hard to cheat.
PEth (Phosphatidylethanol) is a biomarker that forms in your blood only when alcohol is present. It’s not triggered by mouthwash or sanitizer — just real drinking.
Detection window: Up to 2–4 weeks
Accuracy: The gold standard for alcohol testing
Collection: A dried blood spot from a simple finger prick
Why It’s Better
Longer window: Detects drinking weeks later, not hours.
Reliable results: No false positives.
Quantitative insight: Levels show patterns of use — not just yes/no.
Supports accountability: Ideal for behavioral health, courts, and transplant programs.
Why Clinics Love It
At National Labs, we make PEth testing easy:
Just a finger prick, no venipuncture.
Samples ship and store safely at room temperature.
Fast turnaround — results in 24–36 hours.
PEth gives providers objective data that supports real recovery. Request your free kit and see how simple accurate monitoring can be.
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