I wasn't sure what forum to put this in - ADD led me to choose this one as it's closer to the top. I wonder if pycnogenol would inhibit XMRV, too? It's a potent radical scavenger, including of peroxynitrite, and also has some cognitive enhancing properties. Seems custom made for CFS. I tried it a few years ago and was intolerant to it because of some apparent alpha adrenergic effects (undoubtedly related to the reported ADHD benefit), but I might start trying it again at VLD (very low dose) and see if I can build up.