I have been told that pineapple is good for it. I eat it due to liking it and it is of course very cheap here. (50 to 75 cents for a large one)
For me, the cure was a warm climate all the time. My arthritis is due to genetic circulation problems. I barely can tell I have a problem now - before I had pain for 6 months of the year.
But, you sort of have to figure out what kind you have and then keep trying things.