From Wiki:

For most of its existence, chiropractic has battled with mainstream medicine, sustained by ideas such as subluxation[10] that are not based on solid science.[11] Vaccination remains controversial among chiropractors.[12] The American Medical Association called chiropractic an “unscientific cult”[13] and boycotted it until losing a 1987 antitrust case.[14] Chiropractic has had a strong political base and sustained demand for services; in recent decades, it has gained more legitimacy and greater acceptance among medical physicians and health plans in the U.S.,[14] and evidence-based medicine has been used to review research studies and generate practice guidelines.[15] Many studies of treatments used by chiropractors have been conducted, with conflicting results. Collectively, systematic reviews of this research have not demonstrated that spinal manipulation is effective, with the possible exception of treatment of back pain.[11]

But they get to call themselves “doctor” and if your problems aren’t solved by yanking your vertebrae around, Dr van Zyl will happily hypnotize your ass into feeling better about paying his bill.

Oh, my aching stomach! I haven’t laughed so hard since the cat got into the beehive.