I have both CFS and Fibromyalgia. I am looking for something that can stimulate Natural Killer Cell Activity. However, the AHCC description says it also stimulates Cytokine production. Some cytokines are already elevated in Fibromyalgia and have been linked to inflammation and pain. Further, the Arabinogalactan also stimulates monocytes. I worry about other parts of the immune system being overstimulated and causing more pain. I do take IP-6 which stimulates only Natural Killer Cells, but I don't think it works as well. Has anyone with both Fibromyalgia and CFS ever tried either Larch Tree Arabinogalactan or AHCC (Active Hexose Correlated Compound)? Does it work or does it make the pain worse or have other side effects?