Jill Tucker, RN says:

“The probiotic movement has been around for years. It’s one reason why yogurt is so popular. As the effects of antibiotics begins to wane—due in part to overuse—time-tested methods employing probiotics are receiving more attention. Fecal transplants have been proven to be safe and effective, and now the FDA wants to stick their nose in it. Naturally-occurring remedies might best be left out of the purview of the FDA, to allow the free flow of feces to spread it’s probiotic magic.”
Feces Happens—But Medically, Only with FDA Approval

LA Times  June 4, 2013