NOW Foods Quercetin with Bromelain combines two powerful, synergistic anti-inflammatory compounds in one capsule. Quercetin is a flavonoid antioxidant found in apples, onions, and berries that inhibits histamine release from mast cells (supporting allergy and sinus symptom relief), modulates multiple inflammatory pathways, and provides broad antioxidant protection. Bromelain, the proteolytic enzyme from pineapple, enhances quercetin absorption by increasing intestinal permeability, while also contributing its own independent anti-inflammatory and anti-allergenic activity. Together, these two ingredients provide synergistic support for seasonal allergies, sinus health, joint comfort, and general anti-inflammatory defense. NOW Foods provides quercetin standardized for flavonoid content alongside therapeutic-dose bromelain, manufactured in their GMP-certified facility and tested for potency.