I have been blessed in that I am able to control my IBS with my diet. I love asian food (good thing since I am half-Korean!) and most of it is IBS safe. I eat NO dairy, red meat or pork and very little chicken. White rice is my starch of choice, I don't eat much bread.
My "C" is worse when I am emotionally stressed out...thankfully that isn't often.
For me, drinking a packet of Stevia-plus with herbal tea every morning keeps me regular. I learned this by accident. Last winter I went on a business trip...I had just weaned myself off of coffee and was drinking a ton of herbal tea. The artificial sweetners are awful for those of us with IBS so I took my Stevia-plus. I couldn't believe that I was having a BM once or twice a day and essentially said a prayer of thanks and forgot all about my regularity while traveling which is not the norm.
I went on another business trip in August..ate like a pig, ate stuff I wasn't supposed to like baked brie cheese and omelets..cheesecake, it was ridiculous. I had my Stevia-plus with me, suffered not one bit with my stomach, had a BM up to three times a day....UNHEARD OF FOR A PERSON WITH "C" and lost 5 pounds!
There is a direct correlation with me, Stevia-plus and BM's! To keep me regular, I drink one cup of herbal tea with Stevia-plus in it.If I eat more than usual, I will have another cup in the evening.
So for me...between watching what I eat, working very hard to live a peaceful life and one packet of Stevia-plus a day, I have my IBS under control.
I don't take acacia, benefiber or any of that other stuff. It usually makes my IBS worse. There is no magic formula to everyone's IBS. Much of what I have done has been trial and error...it's taken me about three years to figure out exactly what works for me. I hope it takes less time for you!