what ale is made of?
All About Beer Magazine-Volume 29, Issue 5. If you inquire of the average beer geek about the differences between ale and lager, you will probably be told that ale is brewed with top-fermenting yeast (Saccharomyces cerevisiae) and lager with bottom-fermenting yeast (Saccharomyces uvarum).End of conversation. But thereâs much more to tell.First of all, ale and lager are both beers; that is, they are fermented from grain. The major difference between these two beer families stems from the temperature at which fermentation is carried out.nd of conversation. But thereâs much more to tell. First of all, ale and lager are both beers; that is, they are fermented from grain. The major difference between these two beer families stems from the temperature at which fermentation is carried out.