BIO-SIL was started 25 or so years ago when Yvonne's beloved cat Shakira devloped a very large tumour which made her look pregnant. A visit to the vet confirmed that the tumour had invaded several of her organs and this set Yvonne on a mission to seek a natural remedy rather than the usual cut and medicate. The search led her to colloidal silver which was extremely rare in SA at that time. Persistence paid off and within three weeks of colloidal silver administered to food and water, the tumour receeded and disappeared completely. Much research ensued and then BIO-SIL was born! Gordon joined in and with his amazing skills and expertise our wonderful colloidal silver became a household name and we are to this day most proud of our colloidal silver range!