There is a subtle but important difference between intolerance and allergy. My cousin had a dairy intolerance and eventually she developed an allergy to cheese. When she just had the intolerance, she could eat some dairy and it would just cause bloating, d, cramping, etc. But when the allergy developed, every time she ate cheese her face & neck would swell up and turn red, and her breathing would start to be constricted. If she didn't go to the ER, it could have become life-threatening. So some discomfort vs. possible death - I'd say that's an important difference!