By definition, non-alcoholic beers are beers that contain less than 1/2 of 1% of alcohol by volume. That means that even a non-alcoholic beer contains some alcohol, but not nearly as much as a regular beer. By comparison, Miller Lite contains about 4% alcohol by volume. It is impossible to remove all of the alcohol from a beer. Alcohol is a natural by-product of the fermentation process and many grape and fruit juices contain minute amounts of alcohol by volume, a result of sugar in the juice converting to alcohol.