I was just trying to determine just this very thing. I am IBS-c also but only go one day without a bm ever. Usually every day, just too hard when i do go and straining. I had felt I was stable but when i started to up my IF I also had much more gas and bloating. So I went back to using bentyl after not using for a week, then stuck to pure SF for a day or two. my stools are softer. It may also depend on what IF you add. I had two unpeeled pieces of fruit and that was too much for me. I am trying to stick to cooked veggies and pureed fruit in smoothies for IF. also a little ground nuts in Heathers breads. Anybody know how much IF is enough.I personally would eat none if that would help constipation.
-------------------- IBS-C bloating and gas predominant.