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.
A doctor might check the vitamin D or calcium levels in the blood if there are problems with the bones. Similarly, if an individual is anemic, the doctor may check the iron level. slide 1 of 6. Vitamin D Tests One of the more common vitamin and mineral blood tests is the vitamin D test.