Treating obesity may directly improve psoriatic arthritis outcomes, according to Phase 3b data released Wednesday by Eli Lilly. In the TOGETHER-PsA trial, patients receiving both Zepbound (tirzepatide) and Taltz (ixekizumab) showed a 64% relative improvement in arthritis disease activity compared to those on Taltz alone. The findings suggest obesity treatment directly improves psoriatic arthritis disease…