What’s the difference of having food intolerance, and having upset stomach because you’re not used to what your eating as of the moment?

Question

What’s the difference of having food intolerance, and having upset stomach because you’re not used to what your eating as of the moment?

In: Biology

Answer 1

I don’t know if that second one is really a thing. I mean I guess if it happens more than once with the same food group then it’s for sure intolerance and not another factor like you’re not used to what you’re eating.