Today at my doctors he gave me 2 pages of info on a product/supplement called ribraxx. Its said to help improve NK activity etc etc and said i should look into it. It seems to be something quite new for my doctor and he doesnt have any experience with patients using this. Does anyone know much about this?? The website seems to be only available to practioners prescribing this although it doesnt sound like a prescription type med it, only seems available from certain practioners. Does anyone know a price? Is there an online place to order this from without going through a doctor? Has anyone found it helpful? Ribraxx consist of arabinoxylan MGN-3, compound extracted from rice bran that has been enzymatically broken down by shiitake mushroom extract. It is rich in polysaccharides and proteoglycans. Scientific studies show a boosting of natural killer cell activity. The above is of the pamphlet i have. cheers!!!