There are well over five hundred beer yeast strains available for use in brewing beer. If a beer recipe calls for a particular strain or brand of yeast that it is unavailable, there is a good chance that a substitution can be made without causing much of a difference.
Yeast substitutions need to be chosen carefully. The flocculation, alcohol tolerance levels and optimal temperatures should be close between substitutions to ensure the beer is similar. You can also compare different yeasts with our exclusive comparison wizard.