Is Epsom Salt evil?

I am doing my research in preparation for the first liver flush. I was convinced to stick with Dr. Clark's protocol until I came across Dr. Richard Anderson's article where he strongly warns against using Epsom Salt:

"Note: Some flushes recommend taking Epsom Salt (magnesium sulfate). DO NOT DO THIS!!!

Although magnesium sulfate is effective at moving the bowels because of its extreme toxicity, it will also calcify your epithelium wall, partially destroy your digestive tract, and use up valuable electrolytes. Epsom Salt is extremely destructive to the entire digestive system."

Here is the link to that article: http://www.cleanse.net/gallbl_1.HTM

Now I am confused. Can somebody comment on this issue? Please do not reply with something like "Well, I did my 20-th flush with Epsom Salt and still alive"; I am looking for more or less scientific approach.

http://www.cleanse.net/gallbl_1.HTM