I spend a lot of time researching my arthritis, and believe me there are lots of diets out there arguing they can help with arthritis. Many of these are similar versions of the same thing, however others seem, to me, to be at the other end of the dietary spectrum.
Let me be clear the daftest diet will cure someone of something. Some years ago I remember some woman saying she lived happily and entirely on a diet simply of crisps: breakfast lunch and dinner. In reality this is testament to the success of the human body in adapting and correcting most whatever is thrown at it.