Assertion: brussels sprout's sulforaphane | /r/HasProperty | chemical
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text: Published in the March edition of the journal Clinical Immunology, the research shows that sulforaphane, a chemical in Broccoli, triggers an increase of antioxidant enzymes in the human airway that offers protection against the onslaught of free radicals that we breathe in every day in polluted air, pollen, diesel exhaust and tobacco smoke.