We're all doing our best to maintain good health. Have you investigated oxalates which can cause an arthritic reaction in some people? Before my PMR diagnosis I realised my new "healthy" diet was extremely high in oxalates from the "superfoods" I was eating.

Very high in oxalates are baby spinach & swiss chard, beetroot, almonds, turmeric, cocoa, most nuts, whole grains, hydrolysed collagen, etc. These were all things I was eating in fairly large amounts before getting PMR. Oxalates bind to calcium which reduces its absorption and can cause kidney stones in some people. They can also cause calcium-oxalate crystals in joints and the tissue surrounding them, causing an inflammatory response.

If you haven't investigated oxalates & lectins (anti-nutrients) and the foods that are highest in them, it may be worth a look.