We know little if Human Probiotic Infusion (HPI), would turn out to work. But, hypothetically, if it cured CFS - would you do it? Yes, it does involve feces. Taking feces from someones and putting it into someone else's. There are hundreds, if not thousands, of c.diff. patients whom find their illness is so bad, that they do this every year. It's becoming more of a mainstream treatment in Europe, although not common everywhere, and in the US, more and more doctors are beginning to perform it (for c.diff.). But -- would you do it if it turned out to be a cure for CFS?