What is the common diet of food-related IBS patients? Besides most patients being lactose intolerant, what other intolerances do they face?
IBS stands for Irritable Bowel Syndrome. The IBS symptoms include belly pain, diarrhea, bloating and constipation. Different persons have an intolerance to different food items. You can know what's causing trouble in you by taking a test at http://intolerancelab.co.uk/intolerance-2.

The most common diets that you can prefer to get rid of IBS symptoms are:


High Fiber Diets can help prevent constipation.
For some people, high fiber diet is intolerant. They should switch to a low fiber diet.
You should prefer a gluten-free diet.
Have a low-fat diet and get rid of a number of health problems.


Some food items that can cause food intolerance are:


Dairy products
Soy products 
Fructose
Wheat
Gluten