The role of diet in RA is controversial primarily because of competing interests but also because there is a major flaw in most diet based healing techniques IMHO.
I believe that remission from RA can be achieved by eliminating inflammatory items affecting an individual from the diet. This is a different approach than following some healthy diet menu.
No matter how much healthy food you eat, you can still suffer from RA if there is something in your diet that does not suit you and it is different from one person to another.
A good indication of this problem is your RA pain comes and goes away. It is likely that some days you did not consume that item and other days you did. I found that whenever I ate peanuts or any wheat product such as bread, bagels, croissants, crackers etc. I had severe pain in all joints but mostly in the hips and knees. But these foods did affect my family members and any friends at all.
My suspicion was confirmed when I read a book in the local library written by a practicing rheumatologist claiming he has cured all his patients completely of RA by finding and eliminating their inflammatory foods. He used several diet changes to find those foods which took about 6 weeks or so.
There is an easier way I figured out to verify food is an issue.
So what I did is I ate only a single item (I picked mixed green salad with a simple dressing like olive oil and vinegar), for 3 days. This eliminated the possibility of having some problem food in my diet except the salad. My pain was much reduced next day and totally disappeared within 3 days. I felt very energetic and refreshed in spite of the low calories diet. Of course I would miss other foods if I ate only salads for the rest of my life. So I tested other foods, one by one and found many items safe and a few unsafe ones. I am not only pain free for the last 25 years but my general health became much better than prior to RA inception. My recovery was speedy perhaps because I never used any conventional drugs and used Tylenols etc. only occasionally. It might take others a few more days but that is only a guess.
So if anyone is not happy with the results of RA drugs, it makes sense to try this approach. It costs virtually nothing and it will likely provide permanent relief.
I believe the gut microflora has something to do with inflammatory foods. Without certain microbes in the gut some foods cannot be digested properly resulting in toxic byproducts. By experimenting with probiotics and prebiotics I was able to modify the gut microflora and now I can eat all foods. Mayo clinic reports a connection between RA and Gut microflora which they further investigating.