Phosphatidylethanol (PEth) testing to identify recent alcohol use

The term phosphatidylethanol refers to a group of phospholipids that form on the surface of red blood cells when alcohol is present. Phosphatidylethanol (PEth), measured in the blood, is a laboratory test that can be used as a biomarker to identify recent alcohol use. When and how much? Blood PEth concentrations (Mazhar and Cheung, 2024):…