Isinglass is not used very much outside breweries trying to do really traditional British styles, because it’s finicky and there are better and cheaper options. I’d say that the most common thing making beer non-vegan is adding adjuncts like lactose in milk stouts.
No they aren’t, unless specified. A lot is isinglass (spelling?) To clarify it, which is fish parts.
Isinglass is not used very much outside breweries trying to do really traditional British styles, because it’s finicky and there are better and cheaper options. I’d say that the most common thing making beer non-vegan is adding adjuncts like lactose in milk stouts.