Yes, I am a dietitian and do believe that diet plays a role in PMR symptoms. I eat a whole foods organic diet and my PMR only bothered me in bed. As soon as I would get up, it went away! I took a low dose of prednisone for about 1.5 years and then got off of it, only to get it again when I caught COVID. Note that I first experienced symptoms after my second Pfizer vaccination.