To create Guinness 0.0, the St James's Gate brewers start by brewing Guinness exactly as they always have, using the same natural ingredients - water, barley, hops, and yeast - before gently removing the alcohol through a special cold filtration method. Cold filtration protects the integrity of the beer's taste and character. The brewers then carefully blend and balance the flavours to ensure the distinctive flavour profile and taste characteristics of Guinness.