Magnesium sulfate / potassium sulfate / sodium sulfate
"This stuff is nasty. Tastes like grape syrup. I hate grape and I hate sweet stuff so it was really hard for me to drink. I was gagging and took forever on the first dose but couldn't quite finish. Now it's the morning dose and I didn't breathe from my nose or smell it and I mixed it with Powerade. Much better but my stomach starts bubbling as soon as I drink and it's a lot of liquid so I had to stop before throwing up. Definitely clears you out but it is horrible."