Probably very few. But if they’re into chiropractic then they’re susceptible to all sorts of “woo” and I wouldn’t trust any of them with one of my knuckles, let alone my spine.

Chiropractors are, by definition, peddlers of pseudoscience.

D. D. Palmer founded chiropractic in the 1890s,[21] claiming that he had received it from “the other world”.[22] Palmer maintained that the tenets of chiropractic were passed along to him by a doctor who had died 50 years previously.[23