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Welcome Anonymous, and thanks for your question.
Phosphatidylethanol (PEth) Testing is typically used to detect alcohol abuse.True Test Labs states the following: A positive PEth result is a reading of 20ng/mL or above, which indicates excessive alcohol abuse. A result over 100ng/mL suggests heavy binge drinking. There is a distinction between a blood test for alcohol and a PEth blood test. A Blood Alcohol Test (BAT) is similar to a Breath Alcohol Test (BAC), as it measures whether someone is currently under the influence of alcohol. A PEth test measures alcohol consumption in the past 3-4 weeks.
I hope this is helpful,
Pat
May 31, 2018 - 8:41amThis Comment