Phosphatidylethanol (PEth) Blood Test
Phosphatidylethanol (PEth) Blood Test
The Phosphatidylethanol (PEth) Blood Test is a highly sensitive and specific test used to detect and monitor alcohol consumption over an extended period. Unlike traditional liver function tests or breathalysers, which may only reflect short-term use or be influenced by other health conditions, PEth testing offers a reliable, direct marker of alcohol intake over the past 2 to 4 weeks. It is increasingly used in clinical, occupational, legal, and addiction recovery settings to provide objective evidence of recent alcohol use.
PEth is a phospholipid formed only in the presence of ethanol (alcohol) in the body, making it a highly specific biomarker for alcohol exposure. Research from institutions such as the University of Glasgow and Karolinska Institute in Sweden has shown that PEth testing is superior to traditional alcohol biomarkers like CDT (Carbohydrate-Deficient Transferrin) or GGT (Gamma-Glutamyl Transferase), particularly when accuracy and detection window are critical. A study published in Alcohol and Alcoholism found PEth to have over 99% specificity and excellent sensitivity, even in cases of moderate alcohol consumption.
This test is ideal for individuals in alcohol treatment programmes, family court assessments, transplant evaluations, or professional monitoring situations where abstinence verification is required. It can also support general health assessments where alcohol use may be impacting liver function, mental health, or other metabolic processes. With a simple blood sample, the PEth test provides clear, evidence-based results that help guide treatment, recovery, or decision-making with confidence.
What Does This Test For?
This test specifically detects and measures Phosphatidylethanol (PEth) in the blood to determine recent alcohol consumption. PEth is a direct biomarker that is only produced when alcohol is present in the body, making it a highly accurate and reliable indicator of alcohol use over the previous 2 to 4 weeks. It is used to verify abstinence, monitor drinking behaviour, or support clinical and legal decisions where alcohol intake is relevant. Whether used in addiction recovery, workplace screening, family court proceedings, or medical evaluations, the PEth test provides clear, objective evidence of alcohol exposure.
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Specifications
Specifications
How to take a test
How to take a test
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"The process was quick and easy. I had results back in two days with helpful insights from a doctor."
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How it Works
Order Your Test
Choose your test online and we’ll send you everything you need.
Take Your Sample
Use the simple finger-prick kit to collect your blood sample at home.
Post It Back
Return your sample in the prepaid envelope — no need to visit a clinic.
Get Reviewed Results
Your results are reviewed by a qualified lab technician and delivered securely online.
FAQ's
Do I need to visit a clinic to take the test?
Do I need to visit a clinic to take the test?
No — our tests are designed to be done entirely at home using a simple finger-prick kit. Just follow the instructions and post your sample back using the prepaid envelope.
How long do results take?
How long do results take?
Once your sample reaches our lab, results are usually available within 1–2 working days. You’ll be notified by email and can view everything securely online.
Are these tests verified and reliable?
Are these tests verified and reliable?
Yes. All our tests are processed in UKAS and ISO-accredited laboratories. Our clinical team includes NHS doctors, GPs, and registered nurses, ensuring medical accuracy and professional oversight.