Researchers say pesticides and tap water could be causing more Americans to develop food allergies.
A large-scale study published in the journal of the American College of Allergy looked at over 10 thousand people and found nearly a quarter of them tested positive for a chemical used in pesticides and in water chlorination.
High levels of the chemical in the human body are associated with a low tolerance for certain kinds of foods.
Food allergies are on the rise in the U-S, affecting 15 million people.
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