Unlike many of you, I am so blessed not to be afflicted with either CFS or FM. But I still believe in undenatured whey, glutathione precursor supplementation for its other possible longterm benefits. And it may or not be responsible for alleviating or controlling other problems I've had. I now take ImmunePlex and I wonder why it is so much less expensive than ImmunePro, understanding that both are "recommended" by Dr, Cheney? I am, by the way, familiar with Immunocal, but my question is about the two ProHealth products. Apologies if I missed anything on the site or in the literature somewhere.