EtG Frequently Asked Questions

March 2004 Ethyl Glucuronide (EtG) Alcohol Testing: Frequently Asked Questions Redwood Toxicology Laboratory conducts a variety of lab tests to detect chemical dependency or substance abuse. One test looks for the presence of Ethyl glucuronide (EtG), a direct byproduct of beverage alcohol (ethanol) that is present in urine up to 80 hours following exposure to alcohol. Its presence in urine may be used to detect recent alcohol consumption, even after ethanol is no longer measurable. According to this document, "the presence of EtG in urine is a definitive indicator that alcohol was ingested." However, in September 2006 the Substance Abuse . . .