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.
Blood levels of zinc are not always a reliable gauge of how much zinc your body has or lacks, Hambidge says. And because the symptoms of a zinc deficiency are widespread and ânon-specificââmeaning theyâre associated with many other health conditionsâdiagnosing a zinc deficiency isnât easy, he says. If youâre worried about a zinc shortage, your doctor will assess your symptoms and, if she deems it necessary, test your blood.