That is true Elf! Asthma, Excema, Hayfever....all autoimmune diseases, but nothing like RA, but one of the first questions my Rheumy asked when I was diagnosed with sero+'RA was did I have allergies as a child?
I too am very cynical about a GF diet for anything except CD , but quite honestly if you have RA & think strongly enough that it will work, it may well do so....so live on GF food & bottled water. If you are pain free it may well be worth it.
My friend has CD, & is slowly having parts if her intestines removed after years of not knowing what was wrong with her...she now eats GF,but it appears not to,help much as her intestines are so damaged.
Good Luck to anyone who tries it & I wish them well, but just DON't try to tell me it will work for me!
I am not giving up my Sunday morning Croissant for anyone!