STILL A FEW BUGS IN THE SYSTEM: Poop Pill’s Surprise Failure Shows That the Microbiome Is Still a Mystery.

SER-109’s surprising flop is a humbling reminder of the microbiome’s complexity. But even if the treatment had been successful, its creators would’ve been hard-pressed to present a concrete reason why. Many microbiologists have called for a healthy dose of skepticism in microbiome studies. Its potential may be great, but for now it looks like the good old-fashioned fecal transplants still have the drugs beat out.

I’m so old, I can remember when fecal transplants were new and innovative, not good and old-fashioned.