I do not have RA so others with direct experience may have better ideas. From what I have read, a blend called KLOW that combines BPC, TB, GHK and KPV looks worth checking because each part is said to lower inflammation. I take it myself and long-standing joint problems have stopped bothering me. VIP is another one that comes up often for RA relief in reports I have seen, though I have no personal experience with it for that purpose.
I hope this is the right place. My wife and I both began Tirz last April. She has dropped nearly eighty pounds and is now at a stable weight on a maintenance dose. One unexpected benefit was that her RA symptoms eased a lot and she felt fine on most days. Lately it seems her system is adjusting so the relief is fading and food noise is returning too. We do not want to raise her dose since she already lost more than planned, but she would like something else that targets the RA. I have heard there are other anti-inflammatory peptides and would like suggestions on which ones to look into.