Has anyone heard that there is a disease that some IBS patients have (that they are misdiagnosed with IBS) but it is actually a little known disease/syndrome/condition which causes the symptions of IBS but upon further research the patient is found to be lacking in several major vitamins...D,K,C,Iron, etc....... There is suppose to be some type of breath test. I have had IBS for 30 years. Major constipation. And have just been diagnosed with severe vitamin deficiencies and am taking RX strength iron & D, C, and over the counter magnesium/zinc.