Changes

Boiling is also when hops are added. The brewer will make a hop addition as the kettles are being filled, before the wort actually begins to boil. Other than being aged, the hops are usually Belgian, Czech, German or German English grown hops (note that many modern Belgian grown hops are varieties which originated in the UK). It is important to use hops with low alpha acid content as brewers are not looking for bitterness or acid contents; only the antimicrobial properties contained within the hop.