How could someone distinguish between a true food allergy and a food intolerance?
People who suffer from food intolerance or from a food allergy may both have digestive distress after eating an offending food. A person with a milk allergy will have high levels of antibodies that bind specifically to milk proteins. These antibodies also cause white blood cells to release histamines that can lead to allergic symptoms. Lactose intolerance is due to the lack or decreased amount of lactase enzyme that breaks down milk sugar. There are no antibodies produced with lactose intolerance, just a lack of the milk sugar digesting enzyme.
A simple blood test can distinguish between a food allergy and a food intolerance based on the presence or absence of antibodies to milk protein or other offending foods in the blood.
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