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Glucosamine tablets are made from natural sources, usually seafood (e.g. shells of shrimp, lobsters, and crabs).



I’ve heard that in japan (or at least parts of it) they eat shrimp whole, and it’s kind of amusing when visitors bite off the tails.

Also the little “bones” from certain fish I expect do the same.


There's even snacks that are just the fried fish bones. http://seriouseats.com/2011/03/the-nasty-bits-fried-fish-bon...




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