This extract contains pure iso-alpha acids, which can be added to beer at any stage (post fermentation is best) to add up to 50% of its bitterness. (Not recommended for bittering your beer entirely since there are secondary benefits from wort boiling with hops.) However, our Iso-Alpha extract is useful for correcting an under-bittered beer and also for training yourself to judge bitterness levels. In the book Using Hops (see page 26) a method is presented where you can use the Iso-Alpha extract to estimate the bitterness level of your beer at home. The Iso-Alpha extract can be added at any stage of brewing, but best utilization will occur if added just prior to bottling or to the serving keg. Simply add 1/8th of a teaspoon to 5 gallons of beer for each single IBU you want. Supplied in a 2 oz bottle with a dispensing cap, enough to add 16 IBUs to 30 gallons of beer.

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