CALCIUM and MAGNESIUM with ZINC contains the 3 minerals most commonly needed to build healthier/stronger bones and teeth. The minerals used in this product are all naturally derived from earth ores and great care is taken to make sure that these minerals are of the highest purity – free from lend and any other heavy metal contaminant. Besides the more common minerals, there are also trace minerals or elements, which have also been defined as essential for proper nutrition.