Food Allergy Or Shingles So What's The Difference Between Food Allergy And Food Intolerance?

So what's the difference between food allergy and food intolerance? - food allergy or shingles

If I have a food allergy can also types of food intolerance?
Please explain in their own words, I read a definition in the free as well. A response from a doctor here would be appreciated.

(The reason I ask this because I am trying to determine whether a way could be if I IBS and food allergy to wheat / gluten intolerance can be. And I heard a lot of people with IBS are intolerant to gluten. Maybe even figure out what would make my life easier.)