The gut-brain axis is so important. It's only natural that commenters here would want to know when a treatment for RA is available based on these findings. Nothing's for certain, but it wouldn't hurt to improve your gut biome.
- Take a probiotic and prebiotic daily. Swanson sells a bunch of cheap and high-quality ones. - Some people have had luck improving their gut health with supplementing collagen peptides. YMMV.
Obviously, the gold standard is a double-blind study that proves the effectiveness at eliminating rheumatoid arthritis through intervention. Both of the above suggestions are well-tolerated in the general populace.