This topic can feel complex, and in many ways it is.

At the same time, much of that complexity sits on top of simple mechanisms that are often missed.

Let’s walk through it.

Allergy vs Intolerance

One of the first distinctions that matters:

• Allergy → typically an IgE response

• Intolerance or sensitivity → often IgA or IgG

You do not need to memorize that.

What matters is this:

Your body can react to something without it presenting as a classic allergy.

What Conventional Testing Looks For

When someone is tes…