It started as a desperate search for a cure to a tumour in the family Tonkinese cat, Shakira, and became Yvonne’s lifelong calling. When modern medicine claimed there was nothing to be done for her dying cat, a chance meeting introduced Yvonne to the powers of colloidal silver. In the early 1990s, there was very little access to this natural remedy, but once administered, Shakira’s tumour cleared up and she lived a long and happy life. Yvonne decided it was time to bring this knowledge to the world and, without spending a cent on advertising, has taken Bio-Sil from strength to strength.