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Vytanutra Buffered-C 1000 Complex is a scientifically-formulated blend of ingredients that strengthen the immune system. It contains an ample serving of vitamin C as well as essential minerals such as zinc, calcium, and copper. In addition, a proprietary blend of Astragalus root, Reishi fruiting body, Rutin, and a Citrus bioflavonoid complex also provide immune‐strengthening activity.