I have IBD - Crohn's colitis which, when flaring, means that dashing to the loo is all I do do so I know how you feel.
I too was in need of dietary advice - not so much for weight loss - just knowing which foods didn't cause or aggravate inflammation.
Technically, I am a lacto vegetarian but eat very little dairy mostly just fruit and vegetables. I was advised to cut back on fruit and most vegetables, to eat only white foods: white rice, white bread, potato ... which sounded like a recipe for weight gain. I had put on a little weight through having to take high doses of cortico steroids to treat the IBD but expected this to fall away once I was off them.
I came across Andrew Taylor aka SpudFit - a man who decided to break his self-confessed food addiction by eating only plain potato for a year. I started to chat to him about the anti inflammatory properties of potato and was convinced enough to try the diet.
His rationale about weight loss diets is that most make you think about food all the time: what to shop for, calories, treats, what to feed the family while you are dieting, feeling hungry, cravings etc etc none of this good if you are addicted to food. He figured that if you make your diet as bland as it can possibly be you soon stop thinking about food. You use the time you would otherwise be using to plan meals, shop and cook, on other things.
I imagine people reading this are feeling very sceptical. I did too. But seeing as I had been told to eat white foods including potato, needed to give my colon a rest, needed to get my high inflammation markers down and wanted to lose the steroid weight I decided to give it a try.
I ate nothing but mashed and baked potato for two months. I found it quite easy. I'm not that interested in food, dislike grocery shopping and cooking. That I could buy a big sack of spuds, bake them in the microwave or boil up some mash was appealing, very easy and very cheap.
I lost three stone as easily as anything and hadn't felt so well in ages. Potatoes are bland but very nutritious. bit.ly/2oqtZlq
There is a ton of stuff online about this. There's Andrew's own website and a lot of blogs from people who have tried the SpudFit challenge ... this one for example bit.ly/2uaiQJY
I'm aware that people with diabetes are advised not to eat a lot of carbs. Dr Neal Barnard has an opposing view. bit.ly/2MUHbet
You don't have to do it for a year as Andrew did although his eight stone weight loss is impressive. Just a month could clean up your digestive system, calm your colon to help reduce the IBS symptoms and trigger some weight loss to get you on the road to feeling better.
I mentioned the diet to a hospital nutritionalist. He was horrified but it was clear he was of the all-carbs-are-bad school. All I can say is that my subsequent blood test results were good, I lost weight and felt great so it worked well for me.