PLATINUM - Quercetin 15x - 120 Capsule(s) - NPN: 80102816 -- Quercetin 15x, features citrus-free Quercetin from a plant named sophora japonica. Quercetin is a bioflavonoid and natural potent antioxidant, that in combination with Vitamin C helps support the immune system. Laboratory studies have shown that when Quercetin is suspended in a healthy oil the body is able to sustain greater circulating amounts of Quercetin, resulting in greater bioavailability. Quercetin 15x is made with our Superior Nutrient Absorption delivery system that suspends the nutrients in healthy Grape Seed Oil to enable your body to absorb more of what it needs throughout the day.