Diet and arthritis....

To date there is no convincing evidence that diet or dietary supplements can cure arthritis.

The Effects of the Mediterranean Diet on Rheumatoid Arthritis Prevention and Treatment: A Systematic Review of Human Prospective Studies. Rheumatol Int.2018 May;38(5):737-747. doi: 10.1007/s00296-017-3912-1

This review has identified beneficial effects of the Mediterranean diet in reducing pain and increasing physical function in people living with rheumatoid arthritis. However, there is currently insufficient evidence to support widespread recommendation of the Mediterranean diet for prevention of rheumatoid arthritis.