Charlotte, Yes, sugar is the most potent inflammatory food--primarily because it's low fiber and low nutrient-density/calorie is replacing high fiber and high-nutrient density foods. I am a registered dietitian and contracted PMR after my second Pfyzer COVID vaccination. I had a very mild case--no inflammatory blood markers and it only hurt while in bed! It took me about a year to wean off of 10 mg. of prednisone and I had one flare when I caught COVID, but I am now off of prednisone for several months. I eat an organic, whole foods, primarily plant-based diet that includes about 3 oz. of animal protein per day. I do eat a little something sweet after dinner, like fruit pie, which doesn't seem to affect me at all. I think the single most important nutrient lacking in the American diet is fiber, which feeds your gut microbiome, and when food is processed and the fiber is removed, most of the nutrients are also removed. Keep in mind that 70% of your immunity starts in your gut. If you feed your gut mcrobes and keep them healthy, your whole body will thank you.