I tried Mediterranean diet first with some success but switching to whole food plant based, low-fat diet has been a game changer. Especially when I learned low-fat meant, no oils and cut out salad dressings that have oil, olive oil, and processed foods with oils. Within a few days my digestive disorders (gerd type symptoms) calmed down and all but disappeared. Then I cut out alcohol. The hip and leg pain is getting better day by day, slowly but steadily feeling stronger. What this equates to is cutting out all animal products, all oils and fats including nuts, seeds and avocoda (for now, maybe not forever but until gut is healed), sugar, artificial sweeteners, honey, (any kind of sweet other than fruit), processed starches, caffeine, alcohol, etc. Basically eat only whole food plant based, low-fat.
I haven’t done it 100% without fail but close. At some point you begin adding back foods to determine whether you’re sensitive to them or not.
Also, try a natural de-wormer like wormwood. I’ve used Fenbendazole which is an anti-parasite that also kills tumor cells. If you have autoimmune disease, the bad bacteria in the gut is overloaded and parasites feed on bad bacteria so there is a parasite load. Eating leafy green vegetables is a natural way of increasing good bacteria which crowds out bad bacteria and hence parasites. But give your body a boost by eating bitter foods which are natural anti-parasitic.