Sjogren's disease and possibly rheumatoid arthritis

I believe I have sjogren's disease and possibly RA (test are forthcoming)
and I want to know if the Rosedale Diet can help provide relief for my
joints, specifically shoulders, neck, hands and wrists?

The diet will help lots! As it works in reducing inflammation. If you do not see some great improvement you should get a stool analysis to make sure you have the proper flora.