Second tip - don't try to solve UC with only diet. I was fanatically into this idea at first, researched the best possible foods for UC, and kept to a perfectly healthy and mild diet for four months. No go. A year later I tried the Specific Carbohydrate diet - okay, so I was only on that one for two weeks. Absolute torture. I wasn't sure at the end if I wanted it to work on not. It almost ruined some foods for me that I used to like. Didn't see any improvement in that two weeks anyway.
I'm in remission due to probiotics and diet. How you tried just eating/drinking foods/beverages that are anti-inflammatory and avoiding anything pro-inflammatory? Some natural ingredients, especially turmeric, are good at reducing inflammation while others are pro-inflammatory even for those who have found they have no food intolerances.
Anti-inflammatory (Eat more of):
Soybeans, tofu, and soy milk
Whole grain products (if not wheat intolerant)
Seeds and nuts (if they don't irritate your colon)
Green leafy vegetables (e.g. spinach)
Pro-inflammatory foods (Avoid):
Nightshades (tomatoes, white potatoes, bell peppers, chili, paprika, eggplant)
Joy - 47 yrs and counting; Dx Colitis Dec 06 (also had IBS); Currently in remission
Figuring out how to reduce a flare or get into remission is a trial and error experience. Don't expect your GI to have all the answers. He was trained in making diagnoses, prescribing medications, and surgically removing the colon. He was not trained in alternative treatments. That's why they are called alternative treatments.
What works for me: Fecal transplantation, Probiotics, Anti-inflammatory foods, No HFCS, No foods high in fructose, No artificial sweeteners, No pro-inflammatory foods when flaring, Vitamins, Lexapro (for stress).