Magnesium sulfate / potassium sulfate / sodium sulfate
"Pleasantly surprised to find that there are an awful lot of drama queens/kings and cry babies on here. The stuff really does not taste all that bad. Started by holding my nose only to end up casually sipping it. Only thing I will say is that you will do yourself a favor to camp out in the bathroom and make yourself as comfortable as possible. Bring laptop, books, Ipad, phone. Your going to be in there for a while. Also a small heater and jacket for when you get some chills. Stay in there for as long as your still going, otherwise I can see how people would have accidents. Good luck!!"