Quercetin is a flavonol polyphenol found naturally in onions, apples, capers, and other plant foods, and it is one of the most studied bioflavonoids in the immune and antioxidant wellness category. What makes it particularly relevant for those building a daily wellness routine is its well-researched profile. Quercetin supports antioxidant activity through direct free radical scavenging and supports overall immune balance as part of a consistent daily routine. * It has also been studied for its relationship to zinc transport, which is why pairing it with a zinc supplement supports a more complete immune wellness routine than either ingredient alone. * Double Wood's formula delivers 1,000mg of quercetin plus 200mg of bromelain per 2-capsule serving. Bromelain is a pineapple-derived enzyme commonly paired with quercetin to support its bioavailability, quercetin alone has limited absorption. Every batch tested. Third-party tests by ISO/IEC 17025 accredited labs. COAs published openly. For a more complete immune and cellular wellness routine, Quercetin pairs well with Zinc, and with Phosphatidylserine for those who want both cellular health support and cognitive stress resilience in their daily regimen.