<<Disclaimer: Verify this information before applying it to your situation.>> I looked up the comment about certain preps can cause kidney damage and found an excellent article at the NY Times website about the risks to certain categories of people who use phosphate colonoscopy preps. The article is available free if you register. I searched the nytimes.com with the keywords "laxative kidney damage". I am so grateful for the informed, helping people on this list. Paula in Pa. Article Title: Danger to Kidneys May Lurk in Some Preparations for Colonoscopies Published: December 27, 2005. Here is the link: http://www.nytimes.com/2005/12/27/health/27cons.html?pagewanted=2&ei=5070&en =d8e974ecbe11f0ee&ex=1151553600 *Support summarization of posts, reply to the SENDER not the CELIAC List* Archives are at: Http://Listserv.icors.org/SCRIPTS/WA-ICORS.EXE?LIST=CELIAC