Hi all, FOr those who have never tried, this is one of the best herbal products I belive on the market. It is called Isatis cooling formula by HEalth Concerns. It is a potent antibacterial/antiviral for those who do not want or can not tollerate antibiotics or virals. Follow instructions carefully because it clears heat and elimates pathogenic factors. CHinese online retailers sell this, not expensive, and very effective. I have tried it on myself and a friend and both felt the same. Isatis cooling formula not Isatis Gold. Let me know if you have any questions, I can get a product description if you like.