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.
If you are always tired you may have iron deficiency anemia. This test is may be needed if other initial iron tests for hemoglobin (level of oxygen carrying protein) or hematocrit (proportion of red blood cells to the fluid component) are low. A ferritin test can confirm a diagnosis of iron deficiency anemia.