With Quercetin, Wellemon ,and Turmeric. Plant-powered ingredients provide daily support. Quercetin is a plant-based flavonoid that supports a healthy immune response and respiratory health Cardiovascular Support. Capsules also support cardiovascular health and healthy mast cell function Purity Tested. Quercetin Synergy is Non-GMO Project Verified, vegan, gluten-free, dairy-free, and soy-free Our Story: Since 1987, our purpose has been to connect people, plants, and planet to create healing For Healthy Immune Response. Quercetin Synergy supports healthy sinus, respiratory, and immune system function.