Linda,I am glad you responded. One of the subjects that was mentioned to me was the extended use of calcium and kidney stones. I was worried if the calcium helped the IBS I could then develop the stones. I bought the calcium last night but haven't started them yet. I have discontinued the multi vitamin. I had a bout with the D after lunch today after eating a casserole that had cabbage in it even though I am taking the prescription Colestid for the IBS. I do know what to do, stop the Colestid and try the Calcium??? What is green tea extract and is it available in pill form?