Natural Factors, Immune Support, Quercetin, 500 mg, 60 Vegetarian Capsules

Dietary Supplement With Zinc & Copper Suitable for Vegetarians/Vegans Quercetin is one of the most well-known antioxidant bioflavonoids. A free radical scavenger, quercetin helps support healthy sinus, respiratory, cardiovascular, and immune system function. With zinc and copper for added immune support. Isura™: Non-GMO: Documentation ? Mass Spec: Lab Tested ?