What is PEth?

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.