#1 America's Trace Mineral Brand Vitamin D, Premium Calcium, Magnesium, and Zinc Complex with Ionic Minerals from ConcenTrace. Certified Vegetarian Gluten Free Dietary Supplement American Vegetarian Association Super Charged with Concentrace for Better Absorption Cal/Mag/Zinc is a complementary blend of premium forms of Calcium, Magnesium, and Zinc that has been supercharged with ConcenTrace to help ensure the highest assimilation and absorption of these minerals in the body. We've also included vitamin D to create a formula that provides complete nutrition to sustain bone, muscle, and connective tissue health. Feel the Difference Guaranteed! ConcenTrace is a trade name for concentrated sea minerals from the Great Salt Lake.