Yeast foaming during the brewing process at the Shepherd Neame brewery in Faversham;

Yeast

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Yeast are the single-celled organisms without which brewing beer and baking bread would be impossible.

At the fermentation stage of the beer brewing process, these fungal microbes are added to the wort to feed on the carbohydrates in the liquid producing alcohol and carbon dioxide as a by-product of their feast.

Shepherd Neame lab technician inspecting a sample with a microscope in the brewery lab

How important is our yeast?

A brewery’s yeast is the heart and soul of its beer. Our own strains date back generations and require strict management by our in-house team of microbiologists to keep their character pure.

Typically a UK brewer will keep two or three yeast strains at most, each one a closely guarded and highly lucrative commercial asset. Shepherd Neame uses six, meaning our management processes have to be second-to-none to keep each strain separate and secure.

Each batch of yeast will be used between eight and 12 times before it is replaced with a fresh culture, drawn from the National Collection of Yeast Cultures in Norwich, or from our brewing partners around the world.