Over 130 years ago, a simple, inexpensive and effective substance was introduced into medical treatments. The substance in question had some remarkable properties: it deodorised and disinfected, it accelerated the healing process of wounds, it permanently killed viruses, bacteria, fungi and spores, and it broke down into the everyday substances of water and oxygen. It caused neither allergies nor resistances and it was successfully used, as was documented, to treat a diverse range of symptoms.