*Amorphous and Crystalline Magnesium Alloys for Biomedical Applications DOI: http://dx.doi.org/10.5772/intechopen.94914*

Similarly, demand for magnesium is different for a certain age. **Table 1** shows the daily magnesium requirement depending on age.

Magnesium is distributed in the body (in the skeletal system: approx. 60%; in skeletal muscles: approx. 20% and other soft tissues: approx. 19%). Magnesium in acidic form, absorbed from food, in about 30%, can be found predominantly in the small intestine. The daily recommended dose of magnesium depends on the age, gender and current condition of the body. It has been proven, that the average dose for an adult human is about 300–400 mg. Approximately 30% of magnesium is absorbed from the gastrointestinal tract. Absorption of this element is influenced, among others, by the amount of consumed protein, fiber and phosphates. The normal blood magnesium level of a healthy person is 0.75–0.95 mmol/dm3 , and its homeostasis is maintained by the kidneys.

Magnesium has a lot of functions in the human body. For example, it:


Magnesium has been used in treatment of various diseases. **Figure 1** presents the main uses of magnesium for treatment of diseases.

Symptoms of magnesium deficiency influence every system in the human body. The most common symptoms are not very specific – they include fatigue, poor concentration and memory, as well as increased susceptibility to stress. Excessive loss of magnesium can be caused by serious diseases of the gastrointestinal tract (e.g. fistulas, pancreatitis), urinary tract disorders, endocrine disorders (primary


**Table 1.**

*Daily recommended dose of magnesium for kids, youth and adults [16].*

**Figure 1.** *The most important uses of magnesium in treatment of diseases [19].*

hyperparathyroidism, intensive insulin therapy), D3 hypervitaminosis, use of immunosuppressants, increased sympathetic nervous system tension or alcoholism.
