Legal Blood Alcohol Test

The World's Most Accurate Blood Tests to identify Alcohol Abuse

Blood Alcohol Testing

Phosphatidylethanol (PEth) Testing

Simple and Easy to Collect

The most accurate blood test to determine Alcohol Abuse for family courts, fitness to practice, clinical studies and treatment centers.

  1. Phosphatidylethanol (PEth) Testing provides a detection of alcohol abuse with 99% sensitivity (far higher than traditional blood testing methods)
  2. A blood spot/micro sample can be collected by finger prick making it less invasive than a full venipuncture (needle and vial collection)
  3. PEth testing is not affected by medications, illnesses, previous drinking habits, age or the health of the donor
  4. The result provides a detection period of up to 3-4 weeks
  5. Ideally combined with Hair or Nail testing

Period of Detection

The accepted detection period for PEth testing is up to three weeks however the (greater the exposure) larger the binge session(s) the longer the period of detection. Furthermore multiple binge sessions will also increase the period of detection

What the Results Show

A positive PEth result is a reading of over 20ng/mL or above. This is equivalent to excessive alcohol abuse.

It is considered that a result of over 100ng/mL is very strong evidence to suggest heavy binge drinking.

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Alcohol test detection periods

A blood sample for an alcohol test covers approximately 30 day period of consumption, if a client needs to be tested for a longer period, a hair alcohol test can cover up to 6 months of alcohol consumption.

It is important that blood testing for alcohol is combined with hair testing to produce the most accurate result and to avoid false positive results. Hair tests can be affected by numerous factors such as cosmetic treatments, hair types and other variables.

Fingernail testing can also provide up to 3-6 months history of alcohol consumption. Toenail can be tested for 6-12 months detection window for history of alcohol consumption.

How to test for alcohol

DNA Legal offer three different tests for alcohol, and these tests should be combined together to achieve a very accurate result.

Each test has their own advantages and disadvantages, and combined they create a reliable test to determine alcohol abuse or abstinence.

We also offer hair alcohol testing, blood testing and fingernail testing. Fingernail and hair testing should always be combined with blood testing to decrease the chance of false positive or negative results. 

What is excessive alcohol abuse

A blood alcohol test can accurately determine excessive alcohol abuse; this may be required for a number of reasons, such as for family courts.

It can be difficult to clarify excessive alcohol abuse - each person will be affected by alcohol differently, and the results will vary. However, UK courts define excessive alcohol as consuming 3/4 bottle of wine per day over a period of three months, equivalent to an estimated 7.5 units. This level of alcohol is said to result in an elevated risk of an individual causing harm to themselves and others.

The NHS recommend men should not regularly exceed 14 units a week, this would equal to around 7 pints at an abV of 3.6%.