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Ingredients Premium bioactive form of vitamin B12 for optimal absorption and utilization Ingredient source : Pure methylcobalamin Amount per serving : 0.5mg (500mcg) Primary benefit : Supports healthy energy metabolism and nervous system function Natural precursor form of B12 that converts to active coenzymes as needed Ingredient source : Pure hydroxocobalamin Amount per serving : 0.5mg (500mcg) Primary benefit : Provides sustained B12 support with excellent tissue retention LACTOSE FREE GLUTEN FREE NON-GMO VEGAN