I really like Guinness beer when I've been extra good and want to treat myself. Now I read that I'm also treating myself to fish bladders. I love fish but the bladder is one part of a fish I don't want to ingest. In addition to Guinness, there are a handful of other brews my palate frequents that might have ingredients that I could do without. Take a look at this article and see if your beer makes the list of beers you should avoid .