Oh, wow - you're the first person I've come across who has the same combination of diseases I have! I continue to drink a glass of red wine on weekends but only with meals, and with no apparent ill effects. I have found that I feel better if I avoid gluten and tomato sauce, and raw veggies other than lettuce are really difficult for me. Try gluten-free noodles - they're more expensive but taste almost as good as wheat-based noodles. Good gluten free bread is hard to find so I started making my own using a recipe for Artisan Bread on the King Arthur Flour website. They have a gluten-free bread flour that contains deglutenized wheat starch and the taste is very good. Beans are a challenge, too. I digest them better if I soak dried beans for at least 24 hours before cooking them, and then limit how much I eat. When you were diagnosed with collagenous colitis, did your doctor do a Fecal Caprotectin test on a stool sample? That measures how much inflammation you have and if the result was low enough may be why you were told your colitis is "minimal" and not prescribed any medication. When I do indulge in something that will likely set off my colitis, I'll take an Immodium at bedtime to avoid diarrhea.