I have no idea about JUDDD or about RA, but googling 'inflammation fasting' brings up loads of websites with unprovable claims, and one study here: http://www.ncbi.nlm.nih.gov/pubmed/21527899. It's on mice (poor things) and shows that fasting reduced inflammation for mice on a low fat diet but not for mice on a high fat diet.
Here is something Brad Pilon wrote linking depression, inflammation and the (beneficial) effect of IF: http://bradpilon.com/weight-loss/interm ... tion-link/. He mentions sleeping problems too!
And best of all of course is our home-grown topic here on 'IF and inflammation': viewtopic.php?f=10&t=636.