Thanks for reminding me about the elimination diet. It has been decades since I've practiced dietetics, although I have maintained my registration all these years with continuing education. Here is more to share on the elimination diet:
https://health.clevelandclinic.org/elimination-diet
That said, I do think that most of our current health issues in this country stem from an unhealthy gut, i.e., eating an ultra-processed diet, which lacks key nutrients and food that feeds our gut microflora (primarily fiber). 70% of your immunity happens in your gut.
I eat a primarily whole foods, plant-based diet, high in colorful anit-inflammatory foods. I do fudge a bit and eat a few sweets and I also eat small portions of animal protein.
Here is more on the benefits of an anti-inflammatory diet:
https://www.hopkinsmedicine.org/health/wellness-and-prevention/anti-inflammatory-diet
And here is an interesting video from Nutritionfacts.org on lupus and diet:
https://nutritionfacts.org/video/friday-favorites-anti-inflammatory-diet-for-lupus/