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.
New York (CNN) — Friday’s warning from the US surgeon general that alcohol is a “well-established, preventable cause of cancer” is perhaps a wakeup call for millions of Americans, but it’s the ...
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