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The On Guard Chewable Tablets are formulated to help maintain healthy immune system function and provide your body with needed support. These tablets contain the proprietary On Guard® Protective Blend, Vitamin C, Vitamin D, Zinc and powerful Beta-glucan. Studies show that Beta-glucan, a natural prebiotic fiber, helps your body create a healthy gut microbiome and acts as an immunomodulator, proven to help your immune system work as efficiently as possible. Vegan-friendly and free from gluten, sugar and artificial sweeteners. 60 Tablets in a bag. Chew three tablets per day as needed to promote healthy immune function. $22.00