What to eat if you have food intolerance? And which foods does not cause intolerance?

Individual issue. Food intolerance is a food & person specific issue.Some have none, 1 or many. Sometimes it is a seasoning rather than the food. Trial & error is the only way they are identified. A high number of people develop lactose intolerance & this can be transient or lifelong. Individuals can also develop a food allergy which can occur to any food & have symptoms similar to intolerance.