Magnesium sulfate / potassium sulfate / sodium sulfate
"1st time caller here. The taste was not what I expected. Everyone I talked to told me that  its gonna taste horrible. With much anticipation and hesitation, I took the drink around 6pm, and to my surprise, it wasn't half bad. I could even see mixing it with some rum and it might make quite the drink. I didn't do that, but it was just a thought. Anyways, it kicked in around  640 pm and its now 8PM and I'm still on the pooper. I've just been reading and surfing on the net and its now seeming to slow down...This stuff sure cleans you out. I didn't eat all day except for some water and chicken broth. Works good! Wish me luck tomorrow on my procedure. God bless you all!"