Fancy a pint of Guinness today? If you’re vegan, you may want to stick to whiskey (which is always pretty sensible advice, in our opinion). Your Guinness may contain isinglass, a substance like gelatine made from the swim bladders of fish like sturgeons. It’s added to cask beers like Guinness to help remove remaining particles and yeasts from the beer. Try the Jamison’s?
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