NOW Quercetin with Bromelain Supplement has a complementary combination that promotes year-round respiratory health and supports overall seasonal comfort. Quercetin is a free radical scavenger that supports healthy seasonal immune system function.*. Laboratory studies have demonstrated that quercetin can also help to promote normal respiratory function.*. Bromelain has a long history of use by herbalists and is known to help support a balanced immune system response to environmental challenges. A Potent Team Providing Amazing Health Benefits. Anti-oxidant and Anti-inflammatory Properties. Supports Heart Health, Joint Health, Energy Production, Respiratory Health, Inflammatory Response and Overall Healthy Well-being