Hi Matt - so glad you've found this forum. I too am HlaB27 negative, and I too have refused the medication prescribed for my AS - I gave it a shot and wish I hadn't. The diet has been life-changing for me. I have by no means perfected it, and I am a long way from completely beating this illness, but it has helped enough to make it worthwhile persevering. Good luck!
Spondyloarthropathy with symptoms of AS, Sjögrens and fibro. Previously took Celebrex, Methotrexate, Trepiline, Prednisone which seemed to trigger a flare and my illness became much worse. Symptoms now kept mostly under control with NSD, as well as cutting sugar, dairy and yeast and food intolerances. Mostly pain free now and all symptoms massively improved.