I would never say that diet alone will suffice for treating PsA, and I believe it is foolish to try this approach without the benefit of medications. But, certainly, one's diet can lead to a better treatment outcome than medicine alone. The very first recommendation I would make for anyone suffering PsA is to change your diet, if you haven't already adjusted to a healthier diet. I'm not talking gluten free, dairy free, keto, or any of the popular diets that people speculate will lead to an anti-inflammatory lifestyle. I also do not believe in an "anti-inflammatory" diet. But there are plenty of foods that can cause or exacerbate inflammation. The big one I cut out was red meat, at least on a regular basis. I only ever rarely eat red meat, and then only as an ingredient in a meal, in small amounts. My primary source of animal protein is dairy, eggs, and fish, with occasional poultry. But the bulk of my diet, I'd say 75% or more, is plant based. I found that lots of fresh fruit and vegetables, whole grains, dairy, and legumes really have no effect on my disease activity, whereas trans fats and red meat, as well as sugar and other refined carbs, do cause an immediate uptick in symptoms.