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 Omega Absorb™ 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.