The Ultraphos does the same thing. In my opinion much better because it's much more specific. The Ultraphos relaxes the vessels. The most important one with the flush being the Comon Bile duct. With the Epsom salt flushes I've seen too many time where something gets caught in the Common Bile duct. Not good. I've never seen that happen with the Coke, olive oil & lemon flush. It's because the Ultraphos in the AJ for three days makes sure the Common bile duct is relaxed enough to handle the debris coming out of the gallbladder and liver.
Now, if you want to add the epsom slats to help move the bowels, fine, go for it. But if you're going to do the coke flush make sure you have the ultraphos with the AJ for three days. Don't do the coke flush without the ultraphos. Period.