Support for the Body's Use of Vitamin C Natural Factors Quercetin capsules are enhanced with Citrus Bioflavonoids, Bromelain and Rutin. Quercetin, a popular bioflavonoid, is essential to optimize the body's use of Vitamin C. Bioflavonoids are brightly-colored substances that are found in fruits and vegetables, typically as companions to Vitamin C. Bioflavonoids are essential for proper absorption of Vitamin C and have been shown to have antioxidant properties, increase capillary strength and keep collagen healthy. All Natural Factors products are manufactured in accordance with the Government of Canada's Good Manufacturing Practices (GMP), among the highest standards in the world.
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