I suffered intermittently from irritable bowel syndrome for much of my life, especially when sitting exams and under stress, but in 2003 I was diagnosed with type 2 diabetes and adopted a low carb way of eating soon afterwards. To my surprise, the IBS disappeared completely, never to return.
A daily serving of above ground, leafy, green vegetables cooked any way you like them and raw in salads provides plenty of fibre. Ground flax seeds are widely available from supermarkets and health food shops if you need a little extra fibre without raising BG readings and avocados, if you happen to like them, are a tasty way to keep eveything moving.