What caused the Iran hostage crisis? A: The Iran hostage crisis occurred when Mohammed Reza Pahlavi, a domineering Iranian ruler who was recently expelled from his country, was granted access into the United States by President Jimmy Carter to receive cancer treatment.
There are five main categories of mineral deficiency: calcium, iron, magnesium, potassium, and zinc. Calcium is needed for strong bones and teeth. It also supports proper function of your blood vessels, muscles, nerves, and hormones.
Zinc deficiency: Introduction. A zinc deficiency is an abnormal condition in which there is an inadequate amount of the essential trace element zinc in the body. Zinc is an important trace element, and getting a sufficient amount is vital to many body processes, such as a healthy immune system.