in the colon feeds Klebsiella bacteria . Their proteins mimic HLA-B27 , potentially causing your immune system to attack your spine and SI joints while chasing the bacteria. Key research: The link between ankylosing spondylitis, Crohn's disease, Klebsiella, and starch consumption Typical Everyday Sources Grains & Starches Bread, pasta, rice, pizza, noodles Breakfast Foods Cereals, oatmeal, granola Root Vegetables Potatoes, sweet potatoes, fries Late-Night Snacks Cereal, toast, crackers, cookies Does This Sound Like You? My worst days often follow big carb-heavy meals (pizza, pasta, curry + rice) I snack on bread/cereal/grain-based foods most days I've tried "eating clean" but kept oats, rice, or potatoes and still flared Minimal Experiment (3-6 Weeks) "London AS Style" Low-Starch Diet REMOVE/cap strongly: All grains (wheat, rice, oats, barley, rye, corn), bread, pasta, cereals, potatoes, sweet potatoes, beans/lentils, starch-based thickeners BASE your plate on: Meat/fish/eggs, low-starch vegetables (leafy greens, broccoli, cauliflower, peppers, cucumbers), healthy fats (olive oil, avocado, butter/ghee) Track: Weekly pain/stiffness, bowel habits, and whether flares after meals get flatter or disappear