Nature's Way Calcium, Magnesium, & Zinc is a dietary supplement to help promote strong bones and immunity. The calcium and magnesium in this particular Nature's Way product do their job strengthening the muscles and bones. Zinc, on the other hand, promotes healthy cell division which is important for proper growth. Calcium is well known because it maintains skeletal health (teeth, bones). Magnesium is involved in the transmission of nerve pulses, normal body tempurature, and, above all, the formation of teeth and bones. Zinc plays its most vital role in the immune system. This mineral is somewhat like vitamin C because it helps the body get well and stay well. Zinc lozenges are very popular during the cold and flu season.