Here is an informative site on MSM. I've been taking higher doses of MSM for years and have posted about it here over the years....I also subscribe to a group who work with DMSO which is also a sulphur. I've been taking MSM for pain and it does "calm" the chronic pain I deal with. There are many uses for MSM and cancer is another one as are allergies. This is not sulfa, but sulphur....here is a good tutorial: www.cancertutor.com/faq_msm/ Cached Sep 13, 2013 ... Written by Webster Kehr, Independent Cancer Research Foundation, Inc. ... Organic sulfur IS MSM, but MSM is not necessarily organic sulfur. Well, what else is new, the link will not open and if one just copy/paste the above title in their search you will find it....a good read and informative, we never know when we might be faced with treatment..... Of course, I'm also banking on the grape seed ex I've been taking for eons for cancer prevention.