This green vegetable is part of the brassica family, which has many benefits to it, including quercetin. Broccoli sprouts are a rich source of sulforaphane, a potent anti-inflammatory compound.
A 2008 study published in the Journal of Allergy and Clinical Immunology found the sulforaphane-rich broccoli sprout has potent biological effects in stimulating an antioxidant response. The test dose of broccoli sprouts caused more than a doubling of the enzyme GSTP1, which acts as an antioxidant in the body.
This is important since respiratory inflammation is responsible for asthma, allergies, and chronic obstructive pulmonary disease (COPD).