@kimmur, Here is a list of diet and supplements for PMR that may help but I would discuss them with your doctor or rheumatologist.

Diet and Supplements for Polymyalgia Rheumatica (PMR): https://www.arthritis-health.com/blog/diet-and-supplements-polymyalgia-rheumatica-pmr

I was one of the first people to try RECOVERY (a porcine serum polypeptide nutritional ) for PMR. The company was located near me on Vancouver Island so I was fortunate for the team there to work with me. If I understand this correctly it helped the matrix of the cells to stop my body attacking itself. But keep in mind that this was 30 years ago and I am sure there are many other things that could help. I did not take it for my second experience with PMR as my CRP marker was very high and I was near to having giant cell arteritis and it was too risky. I hope that helpsAnd I always urge people to research and discuss with knowledgable people before embarking on anything like this