I think this goes back (again) to the fact that we're all individuals and there is no "one size fits all." IMHO, the SCD as a good place to start investigating what foods work for you personally, and what foods are problematic. Because it is so strict, it does eliminate a ton of foods that are potentially problematic. However, there certainly may be SCD-approved foods that cause problems for YOU or that you're just not healed enough to be able to tolerate. I couldn't eat the SCD yogurt, no matter what I tried. All dairy bothers me. I get my probiotics through supplements, instead. Some notorious SCD-approved foods that newbies who are inflamed don't tolerate well are nuts, nut flour baked goods, beans and raw fruits and vegetables. I always had problems with the "beginner" diet, which is supposed to be super safe. Go figure. My point is you must experiment and find what works for you. Keep a food diary. Start with several days of eating nothing but a handful of foods that you feel/know are "safe" for you. Then add one food every day or two and record your symptoms. Eliminate anything that bothers you - no matter if it's considered SCD safe or not. If trying to follow the SCD becomes too much of a strain, the book Listen to Your Gut offers levels of diets to follow depending on the severity of your UC and The New Eating Right for a Bad Gut offers lists of foods generally tolerated by UCers vs. those that are generally problematic (along with great info about
reducing inflammation with omega3s). These books will give you some guidelines for your experiments without being as prohibitive.
Also, keep in mind dietary changes alone may not be sufficient. For me, it took the addition of probiotics to rebalance gut ecology and healing supplements to reduce inflammation and help heal the colon in order to really see improvement. Stay on your maintenance meds. Healing doesn't have to be either/or. Natural and alternative approaches can work WITH meds and can allow you to reduce or eliminate them eventually. And it takes time. In general, the longer you've been sick, the longer it's going to take to reduce symptoms. On the other hand, once you start to heal, you'll discover you can tolerate a much wider variety of foods than before.