Dimethyl sulfoxide (DMSO) is a chemical compound which is a by-product of wood processing</br>DMSO</br></br>Product Description</br></br>DMSO has been used for over 100 years in the United States | It is a natural substance derived from wood pulp and is harmless when used with the proper precautions.</br><br/>http://www.amazon.com/gp/product/B000K78Z96