Bismuth also has the added advantage of being able to cure your upset stomach,. diarrhea, indigestion/acid reflux!

You just have to dissolve the round in hot nitric acid, then separate the white (tin) crystals that form (after an hour of keeping it hot) by pouring the resulting liquid through an acid-resistant paper filter (or a fancy glass microfiber), and finally react the purified bismuth solution with salicylic acid and BAM! DIY Pepto Bismol 👍