From the Wall Street Journal:
Facebook and YouTube are being flooded with scientifically dubious and potentially harmful information about alternative cancer treatments, which sometimes gets viewed millions of times, a Wall Street Journal examination found.
Now, the companies say they are taking steps to curb such accounts. Facebook last month changed its News Feed algorithms to reduce promotion of posts promising miracle cures or flogging health services, a move that will reduce the number of times they pop up in user feeds, the company says. Some of the affected posts involve a supplement salesman who promotes baking-soda injections as part of cancer treatment.
"Misleading health content is particularly bad for our community," Facebook said in a blog post announcing the moves.