That whole industry is a wacky rabbit hole you could spend a lifetime exploring and still not reach the end of it. It's a bit of a hot-button issue for me due to the harm it causes when seriously ill people decide to forego actual medicine and waste money on a sugar pill instead. That's something they won't get back while tumors grow, cancer spreads or other long-term damage is done. Supplementary, Complementary and Alternative Medicine practitioners collect a paycheck giving false hope to people who might not have the time and money to spare.