I know the subject may be viewed as sensational or just plain wrong, but that is what I have concluded. At the time I was diagnosed with PMR, I already had diagnoses of psoriatic arthritis and fibromyalgia. My PMR started in 2019, about 8 months prior to covid. I was put on prednisone and experienced immediate relief, and told to taper down steadily. But I wasn't told to stop when symptoms came back (I fault the rheumy for that), so I just tapered down to zero despite the pain and stiffness returning at around 9 mg. (I had started from 20 mg). Covid had just begun when I reached zero and went back to the rheumy, and we both agreed that I would just go without so that I was not more vulnerable to covid due to reduced immunity.
So I did three years without prednisone. My PMR got worse over that period; initially it was my neck and shoulders, but after two and a half years, it was affecting my hips as well. Very noticeable to me was my greatly reduced range of motion, of most concern to me when entering a highway at an oblique angle; I just couldn't turn my head far enough over my left shoulder to see if the coast was clear. In September 2023, due to my pain being intolerable, I decided to go back to a rheumatologist, a different one who communicated better and would give me a 2nd opinion. I was given an appointment 3 months out (mid-December), so I decided I would use those three months to try something alternative. That something was switching to a carnivore diet. I did this because of encountering a number of testimonies of people who had been greatly helped by switching to carnivore, and the clincher was reading the results of the 2020 Harvard Medical study of over 2300 carnivores and the benefits they reported.
The first four or five days of carnivore, I suffered from malaise, feeling poorly "all over". This has been termed "the keto flu". After that, the malaise disappeared, even if the diet (only animal products, with a preference for beef and other ruminants) was not to my liking (I have always eaten a very vegetable rich diet and enjoy all kinds of food). After two weeks, my PMR pain was 80% gone! And after three months (by the time I saw the rheumy), my range of motion was greatly improved, and my pain and stiffness was further diminished. At this point (five months since I started), I would say I have no PMR symptoms, including my range of motion has returned to normal. I am still on the diet, but over time I have added in some plant items that have no carbs and, after trying them, don't cause me any problems. These are avocados, mushrooms, onions (as a flavoring), and hummus.
The rheumy's conclusion in December was that, based on my blood markers, I have rheumatoid arthritis with secondary Sjogren's, despite the fact that I have no joint problems normally seen with RA (I do have Sjogren's symptoms). She also endorsed my psoriatic arthritis diagnosis. She decided to put me on methotrexate (stiff dose, 25mg once a week) because that is a treatment for both RA and PSA. I find the methotrexate unpleasant (it has side effects) but am giving it a try until I see her again in late May. (Rheumy appointments are not readily available!)
I share all of this in case it is helpful to anyone else. I have concluded that going carnivore completely fixed my PMR complaints. It also probably spared me from being put on prednisone again. I make no claims that this will work for others, only that it appears to have worked for me.