So yeah Venus Williams has gone vegan...she says it really helps her.
http://www.ecorazzi.com/2012/07/11/venus-slams-sjogrens-syndrome-with-vegan-raw-diet/
Was vegan myself beforehand but went semi vegetarian when I developed a fear of food due to the OCD. Raw food...don't fancy that myself but I'd be willing to give it a shot.
I hope that she's managing as well as possible. :)