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.
Similar to other vitamin and mineral blood tests, the calcium test checks the blood to see if there is an excess or deficiency in the mineral calcium. Calcium is found in the teeth and is an essential element for muscle contraction and nerve function.