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 Krausen

Krausen

Krausen, pronounced, kroy-zen, is the foamy and bubbly head that forms on top of beer during primary fermentation. As yeast ferments the sugars in a beer, it creates a great deal of CO2. The Krausen is formed as the CO2 rises to the top of the beer mixing with proteins, yeast and residues in the beer forming a tall layer of yeast saturated bubbles.

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