Hello ~ I'm just new to this site (today), and have done a fair bit of research on CS. I had started to take it for very severe ear infections which led to muffled hearing (lasted approx 3-4 weeks before I tried cs). It is a 99.9% solution of 5-6 ppm. The label instructed to take 1 tsp for 14 days and quit for 7 days, then if required to start up again. I had noticed my hearing starting to return about 3 or 4 days into treatment. I personally don't think that 10,000 ppm is necessary, but it is certainly dependent upon severity of illness and individuals chemistry.