I am only 34 years old and have suffered terribly for many years. If I was out for the day I was unable to eat as I could only do so if I was in the immediate vicinity of a bathroom. I had all the tests and was told I had IBS. I am under the care of a specialist and was put on medication that didn't help. I told my specialist I had my gall bladder out and that my problems really started there but this was ignored.
My father saw a TV segment on Bile Acid Malabsorption and told me about it as it fit my symptom and as the BMA say up to 1 in 3 diagnosed with IBS are believed to have had it.
I looked it up and spoke to my doctor about it. I was put on Colestyramine sachets and I no longer have any problems at all. I take a couple of powder sachets in 150ml of orange juice in the morning and can now pretty much eat what I want, when I want.
I would recommend everyone look it up as it has massively improved my lifestyle.