Free Amino Nitrogen

Free Amino Nitrogen

In brewing, Free Amino Nitrogen (FAN) is a measure of the concentration of individual wort amino acids and small peptides (one to three units) which can be utilised by yeast for cell growth and proliferation. For vigorous fermenation, a sufficient quantity of FAN must be present in the wort. An excessive concentration in the wort is not desirable however, as this may cause production of a significant quantity of fusel alcohols, or spoilation of the finished beer by other organisms.

References

* [http://www.bio.hw.ac.uk/icbd/Newsletter/Newsletter_Winter_2003.pdf Research Newsletter] of the International Centre for Brewing and Distilling, Winter 2003.
* [http://www.draymans.com/articles/arts/13.html Making Sense of FAN] , Moritz Kallmeyer.


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