Infographic on how alcohol-free beer is made. Definitions of alcohol-free beer vary in different countries, with some allowing small amounts of alcohol. Alcohol-free beers can be produced by avoiding fermentation entirely, but this can impact flavour. More common methods include dilution (where a concentrated beer is produced then diluted), dealcoholisation (where alcohol is removed via distillation or membrane filtration) or limiting the production of alcohol (by using specialised yeast or low fermenting temperatures).