Chiropractics literally started as an alternative to germ theory. The quackery was baked in from the start. They may couch their quackery in medical jargon now in some places but I've yet to see stats where people who went to chiropractors did better than people that went to massages or physical therapy.

Example from Australia last year:

https://www.news.com.au/lifestyle/fitness/exercise/gymgoer-29-died-after-chiropractor-cracked-her-neck/news-story/96b8084d70755d577a44091c976066e7

Yup. And I should say you can find good ones in the U.S., you just never know.

Mine was from New Zealand and worked with one of their Olympic teams. She never cracked my neck but gently massaged and manipulated it to release a whiplash injury after a car accident.

For every one of her, there are 20 quacks who claim they can cure cancer with foot baths.

Can’t blame you. There are good doctors out there who hate the capitalist system and the insurance companies, but they still have to work within that system.

Also the guy who invented it learned the practice from a ghost during a seance

nutritionists

Just a heads up, but anyone can call themselves a nutritionist. It is not a protected term. You don't have to pass any exams. The only thing you need is to be interested in the subject.

https://en.wikipedia.org/wiki/Nutritionist

The actual professional term is dietitian.

In the US it is even worse. Like Certified Clinical Nutritionists (CCN), which are quacks and prescribe things like homeopathy and herbalism. They are neither Certified nor Clinical.

Good chiros aren't chiros.

The inventor of chiropracty said that a ghost taught it to him during a seance. Yes, really, I’m not making that up.

Flip side:
Woke up in agony. I couldn't walk without aid. Why to GP, "it's sciatica. It'll be ok in a few weeks. Two months at most"
6 months later and I can't walk still.
Hospitals did the scans, X-rays, MRI, etc etc, but found nothing wrong. They did acupuncture, physio, hydrotherapy etc.
All slightly helped. However two years later I still couldn't walk without help and then just kept on offering me pain killers.
Nope!!

My mate, "Hey, try my new chiro guy. He did wonders for me"
Me, "Lol, quacks."
My mate, "What have you got to lose?"
Me, "Money..."
...
Mate, "Hey, told my chiro guy about you. He said pop in. The first month is free. If no improvement after then you go separate ways. What have you got to lose?"

Long story short.
On that first appointment he said he thought it was piriformis syndrome. Not back problems.
Within a month I was sitting almost pain free for the first time in two years. Within 3 months I was walking unaided for the first time in years. In 6 months I was running again.
Within a year I was 95% of what I was before the back issues. I'll never be 100% because it wasn't diagnosed in time and everything had 'healed' incorrectly.

Now, with that said, the guy was more than a chiro. He did sports body mechanics, and other things that I can't remember now. He worked with the local lower league football squad for about ten years. And whilst they were no Manchester United they wouldn't just let any quack work on their team.
Plus in the UK chiro's have to be registered and follow guidelines. If they do anything illegal they are fucked.

Flip side to my flip side:
The mother in law went to a chiro who said he could cure her spine curvature disorder. Anyways I find out when she's complaining of (extra) back pain, so I tell her to stop going as the guy is obviously a dodgy bastard. Within the year the guy was arrested for his illegal shenanigans.