Not exact matches
But it is actually quite common
for cask beers to be filtered using
isinglass, a gelatinlike substance derived from the dried swim bladders of fish that is used to separate out unwanted solids like yeast particles from a brew, the company said.
Guinness extra stout is technically not vegan, but if you identify as a vegan and consume Oreos (that are made with sugar that's processed with animal bone char)(I called Nabisco HQ to verify), I'm going to go ahead and say it's totally ok
for you to consume a cake that was made with beer that was filtered with
isinglass — a byproduct of the fishing industry.
The business speedily acquired and held
for half a century practically the whole trade of the country in glue and
isinglass, — a monopoly fairly earned by the cheapness and excellence of its product.
And
isinglass is a fining substance put into beers near the ending stages of production in order to remove unseemly organic compounds like sulfides, copper ions, and proteins (gelatin is often used
for the same purpose).
Much to the chagrin of fish, their dried bladders (formally known as
isinglass) make
for a great filter to accelerate the clarification of beer.