During fermentation, yeast does far more than make alcohol. This is the stage where beer truly takes shape, where it moves from sweet wort to something expressive, layered, and alive. If the brewhouse is about preparation and control, fermentation is where biology takes over and begins to interpret those decisions. As yeast consumes sugars, it produces alcohol and carbon dioxide, but those are only part of the story. Along the way, yeast also creates a wide range of flavour-a

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