Hi Riri ~
I agree that the information out there seems to be conflicting! Unfortunately there isn't a specific answer to this question - it's one of those things that helps some people but not others. As a starting point, I would recommend getting your doctor's opinion on the subject - which is always a good idea if you're interested in trying a supplement or natural treatment.
Here are a few articles that might provide a bit more information on the topic:
Can Probiotics Help RA? https://rheumatoidarthritis.net/living/can-probiotics-help/
Connecting Gut Health with RA https://rheumatoidarthritis.net/living/connecting-gut-health-with/
Best of luck and please remember that we are here to support you!
~Mariah~ (Site Moderator)