My mom goes to a quack chiropractor. He mostly sells her vitamins (by magically divining what she’s deficient in using straight-up fraud “kinesiology”) but keeps her believing by occasionally giving her medically significant advice. He’s still grifting her decades later off of saying she was deficient in magnesium after she complained about constipation. Yeah mom, it worked because that stuff is a laxative. No mom, he couldn’t tell you were deficient because your arm was stronger while holding a vial of magnesium. He’s just changing how hard he pushes on you. It’s fraud mom.