Ugh. We paid a few hundred dollars to find out my son had high IgG for all the foods he was eating most.
Except… that that’s ok, normal even – IgG levels correlate with what you’re exposed to. And apparently, high levels demonstrate high ability to tolerate. Here’s one article, can’t say if it’s accurate:
But it was enough to annoy me for spending the money and freaking out.
I don’t know about IgA.