Proof is a measure of the alcohol content of a beverage. In the U.S., policymakers define proof as twice the percentage of alcohol by volume (ABV). For example, a drink with 40% ABV is 80 proof.

An alcohol urine test involves a lab testing a person’s urine sample for the presence of alcohol. Three types of this test exist. One measures unmetabolized alcohol, while the others measure two of ...

Alcohol breath tests, commonly called breathalyzers, measure blood alcohol content (BAC). The more intoxicated a person is, the higher their BAC. This test is often used by law enforcement to ...

Several tests measure the level of alcohol in your blood. These procedures are typically simple but may take several weeks to get results. A blood alcohol test measures the percentage of alcohol in a ...

It’s a freezing winter night in early February, but inside a chic restaurant perched atop a tower in Manhattan’s labyrinthian Financial District, Jim Gaffigan is regaling a crowd of liquor journalists ...