Since the mid to late 19th century, isinglass, a fish by-product has been used as a clarification agent in Guinness beer. Image courtesy of Wikimedia Commons Guinness sells about 10 million pints ...

That’s because, in order to make the 256-year-old Irish stout many of us know and love, brewers use a product called “isinglass” that is made from dried fish bladders.

Many people may not realise the beer in their pint glass contains isinglass, a gelatin derived from the swim bladders of fish. Now Camra is calling on brewers to investigate alternatives for their ...

To become isinglass, they must be dried, sterilised and cut with acid to produce a paste or liquid that is added to the barrel during the later stages of brewing, to help the yeast used to make ...

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His study sparked off a boom in British-made isinglass; the footnotes to his report, in Volume 63 of the Royal Society's Philosophical Transactions, ...

Many people may not realise the beer in their pint glass contains isinglass, a gelatin derived from the swim bladders of fish. Now Camra is calling on brewers to investigate alternatives for their ...

Isinglass and Cochineal in Beer. Aside from ingredients meant to make their beer taste better, there are also some ingredients that have sparked controversy. One of them is isinglass.