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Go to the shopDr. Perlmutter created this formula with 125mcg (5,000 IU) of Vitamin D3 and 200% Daily Value of Zinc-Quercetin Chelate, blended in a base of organically grown fruit plus probiotics for daily immune system support.† Dr. Formulated Vitamin D3 5,000 IU + Zinc is Non-GMO Project Verified, NSF Certified Gluten Free and Carbon Neutral Certified.