Sulfur compounds, have been found useful in the treatment of cancer. DMSO, when given to a patient undergoing chemotherapy may help the doctor reduce the dosage of the chemo-therapeutic agent. On its own, DMSO has been used by several clinics, including the Donsbach Clinic in treating cancers of the bladder, ovary, breast and skin. Studies by Dr. Stanley Jacobs at Oregon Health Sciences University show that MSM significantly slows the development of both mammary and colon tumors. MSM may also reduce pain and inflammation.