Re: You don't have to use epsom salt, mag supplements will work too

The Liver Flush Recipe Without Epsom Salts
Not everyone can handle Epsom Salts , or need them. Epsom Salts are used to relax the bile ducts and flush the intestines. If you plan on getting a colonic, you don't want to use Epsom salts as that will cause cramping. If you still want to relax the bile ducts but not get diarrhea, take 500 mg of any kind of magnesium you like about 1 hour prior to taking the oil.

From: http://www.askshelley.com/faq.php?p=default&cat=37#a12