The largely unregulated supplement industry sells a variety of weird and sometimes dangerous stuff that it wink-nudge promises will cure what ails you, but even the most accurately labeled, evidence-based supplements can make sick people much, much sicker.

At Scientific American, Beth Mole has a longer story about the FDA's recent decision to exert more control over the use of fecal transplants — procedures that attempt to cure disorders related to gut bacteria by, essentially, giving you somebody else's gut bacteria. — Read the rest