Thanks for the welcomes!
Britdoc: yes, it was because of the autoimmune business, and yes, it was very progressive of him
I switched GPs because I switched universities for grad school and I really can't believe my luck. My last doctor just put me on Prednison and all but gave me a replacement knee catalogue.
I'm a bit stunned by the result myself! We were going to try for three months and then recap, but my bloodwork was so good that I could wean off the pills already. We'll see how that goes.
The background theory is that diet can be a trigger in autoimmune diseases, and animal protein is often viewed with suspicion in this case. Since I ate a lot of dairy, my GP thought that could be an obvious start. There are some studies confirming the link but apparently switching diets radically is too tough on many people, and switching it slowly comes with a very slow result so they don't see the point and stop as well. I was a vegetarian already and liked cooking, so we thought we might as well try. And, of course, I was lucky in that the results were extremely good, which is a great motivator even when the home-made cheese nibbles are singing their siren song to me. I should add at this point that the things I learned about dairy production while searching for vegan meal options are also encouraging to keep away from it.
What's left is hoping that my immune system doesn't pick something else to go Hulk over