Here is part of a previous post I made on the subject:
If you have allergies you have adrenal dysfunction. Allergies result from a lack of antihistamine and antileukotriene epinephrine and anti-inflammatory and immune modulating corticosteroids. This is why doctors use epinephrine and steroids to treat allergies. They are substituting for what the adrenals are failing to put out in sufficient quantities.
The undigested proteins are merely the antigens that trigger off the response. But if the adrenals respond properly we should not have symptoms to the allergic response. Another way to look at this is that we are all exposed to allergens every day, but we don't all have allergies. If the adrenals are functioning properly they counter full blown allergic repsonses to these allergens.