https://www.mayoclinic.org/ https://www.mayoclinic.org/kcms/gbs/shared/gbs definition topic/food-intolerance-201706131236?utm_content=food-allergy
Digestive problems that happen after a certain food is eaten.
With food intolerance, certain foods cause digestive symptoms.
Unlike food allergy, symptoms start slowly and involve only the digestive system, not the immune system.
A visit to see a healthcare professional is needed after a new reaction to a certain food. It's important to find out if it's an intolerance or a possibly life-threatening food allergy.