What Causes a Food Allergy

What Causes Food Allergies? It All Starts in Your Gut

Food allergies (or more accurately, food sensitivities) are everywhere these days. One person can't handle dairy, another gets brain fog from wheat, someone else's skin breaks out from eggs. Reactions range from mildly annoying to life-threatening anaphylaxis.

Here's what most people don't understand: food allergies aren't caused by the food itself.

Your body isn't supposed to react to salmon or almonds or tomatoes. These are perfectly good foods that humans have eaten for millennia. The real problem is what's happening in your digestive system when these foods arrive.

About 80% of your immune system lives in your gut. When that system starts treating food like an invader, something has gone wrong with the barrier between your intestinal contents and your bloodstream.

That "something" is called leaky gut. And understanding how it works is the key to understanding why you suddenly can't eat foods you've been eating your whole li...

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