text: The Society of PEth Research published a harmonization document (2022 Consensus of Basel) for the interpretation of phosphatidylethanol concentrations in the clinical and forensic setting. This consensus represents the first internationally established harmonization document on PEth and was created by an assembly of the world's leading experts in phosphatidylethanol research. The consensus defines the target measurand (PEth 16:0/18:1 in whole blood), cutoff concentrations (20 ng/mL and 200 ng/mL), and minimal requirements for the applied analytical method (accuracy and precision within 15%).