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PEth Alcohol Testing

  • The gold standard of blood alcohol testing
  • Rapid results from our in-house laboratory
  • Detectable in the blood within 1‑2 hours
  • Direct biomarker of alcohol
  • Determines chronic/moderate/low alcohol consumption, or abstinence
  • Verifies a change in a pattern of alcohol consumption
  • The only blood alcohol test that can be performed during pregnancy or within two months of birth

Why choose PEth blood alcohol testing?

Phosphatidylethanol testing (or PEth testing) is the most conclusive blood alcohol test available for determining an individual’s level of alcohol consumption.

The test looks for the presence of PEth, a direct biomarker of alcohol, in a blood sample.

PEth requires ethanol (the intoxicating agent in alcoholic drinks) for its production, meaning that it is only present in the body when alcohol has been consumed.

PEth testing can provide an overview of a client’s history of alcohol consumption for up to four weeks and is the only blood alcohol test that can be used to determine chronic, moderate or low alcohol consumption, or abstinence.

When performed alongside other blood alcohol tests including Carbohydrate Deficient Transferrin (CDT) tests, Liver Function Tests (LFT) and Mean Corpuscular Volume (MCV) tests, a more thorough insight can be gained into an individual’s drinking habits.

PEth testing is also the only form of blood alcohol testing that can be performed during pregnancy or within two months of birth.

Contact our Legal team today on 01 402 9466 or email testing@alphabiolabs.com to request a quote for PEth Alcohol Testing.

Alternatively, complete our online quote form and a member of our team will contact you to discuss your requirements.

The most conclusive form of blood alcohol testing

How accurate is PEth alcohol testing?

PEth testing is the most conclusive form of blood alcohol testing available for legal matters.

This is because PEth is a direct biomarker of alcohol that requires ethanol for its production. This means that it can only be detected in the blood when alcohol has been consumed.

Furthermore, its high specificity (48-89%) and sensitivity (88-100%) can be attributed to the fact that it is directly linked to alcohol consumption.

Our toxicology laboratory is also accredited to the quality technical standard of ISO 17025 (No. 2773) and certified to ISO 9001, meaning you can be assured of receiving 100% accurate, reliable results.

Why not enquire about our Comprehensive Alcohol Analysis Package?

PEth testing is second only to the detection of ethyl glucuronide (EtG) in hair, another direct biomarker of alcohol, which we look for during a hair alcohol test.

For the fullest picture of alcohol use, we highly recommend that PEth testing is used in conjunction with other blood alcohol tests including Carbohydrate Deficient Transferrin (CDT) testing, Liver Function Testing (LFT) and Mean Corpuscular Volume (MCV) testing.

Our Comprehensive Alcohol Analysis Package combines blood alcohol tests with head hair alcohol testing, providing the best insight into an individual’s historic level of alcohol consumption.

We’ll also collect the samples and provide a comprehensive Statement of Witness report as part of the package.

Call 01 402 9466 or email testing@alphabiolabs.com to request a quote now.

FREE sample collections for legally‑instructed tests at our Dublin walk-in centre

Detection window

One of the biggest benefits of PEth testing is that it can be used to detect chronic, moderate, or low alcohol consumption, or abstinence.

Daily alcohol consumption of more than 60g of ethanol can be clearly distinguished from lower alcohol consumption, with PEth being detectable in the blood after 1-2 hours and for up to 12 days after a single drinking episode.

PEth testing can also be used to monitor drinking behaviour/abstinence, to identify relapse, and to verify whether an individual has changed their pattern of alcohol consumption.

The below table shows the range of PEth levels that can be measured using an AlphaBiolabs blood alcohol PEth test.

PEth level (ng/mL)
< 20 Abstinence or low alcohol consumption in the past month prior to sample collection.
20–210 Social/moderate alcohol consumption in the past month prior to sample collection.
> 210 Excessive alcohol consumption in the past month prior to sample collection.

Sample collection network

We have a network of professional sample collectors who can collect blood samples from an address of your choice.

We also offer free sample collection for legally-instructed blood alcohol testing our Dublin walk-in centre

For expert advice or further information, please call 01 402 9466 or email us at testing@alphabiolabs.com.

Request a quote for PEth Blood Alcohol Testing online or call 01 402 9466