My doctor has recommended taking antifactors to stimulate the immune system. He said he recently attended a conference where research on this supplement was presented and many doctors said it has has really helped people with CFS and Lyme. He said there is a product made by Reseach Nutrition in the USA which should become available in Europe in a month or so. I have looked for the Research Nutrition website to see if I can order the stuff direct from the USA in advance of this, as you don't need a prescription, but I cannot find their site. So... Has anyone used anti factors? And does anyone know where I can buy this product?