What's about homeopathy? It is advertised to have medical benefits, presumably has none, and is a multi-billion business, with many companies which exist for de

What's about homeopathy? It is advertised to have medical benefits, presumably has none, and is a multi-billion business, with many companies which exist for decades and decades. For any non-trivial product there's information asymmetry problem, so pretty much everything is hackable, but to different extents.