Wheat & dairy & _________ only play a role if that particular person is sensitive to it.
Just like some people get migraines from chocolate, but not everyone who gets migraines triggers with chocolate, and chocolate doesn't cause migraines in people who don't get migraines.
Some triggers are common.
Smoke / Perfume / Pollen / Mold / Dust / Cold / Exercise, etc.
But not everyone will trigger with every thing.
My son, for example. Is FINE with smoke & perfume (asthma, RAD, plugging, atelectasis, pleural effusions... His lungs are on strike). He'll be BBQ'ing all day or in the cologn aisle tryong on everything (face palm, that boy STANK) and be breathing problem free. All day, all the next, etx. But he DOES trigger on steam. A foggy morning or steamy bath has him turning blue in minutes.
One thing pulmonologists have you do is track what your kids were doing (where, when, what) 24/7 for months. Looking for patterns & triggers. Elimination diets. Particulates. Weather. The whole shebang.
Be ause if/when you can find out what your kids DO react to, you can drastically reduce pulm problems.
IF she's allergic, sensitive, reactive? Then it will make a huge difference.
If NOT? Then no difference at all.