Does MSM produce side effects or adverse reactions?
MSM is inert in body fluids and tissues, is non-allergenic, nonpyretic (it does not cause fever), and generally has no undesireable effects. Fewer than 10% of those taking MSM may experience certain "detoxification" symptoms during the first 1 - 10 days, such as diarrhea, headache, and fatigue. All disappear within a few days. Generally the more toxic one is, the more intense the healing or cleansing symptoms will be, and the more MSM will be required for detoxification. The only "side effect" MSM has is that your nails and hair will grow faster and healthier than before.