Selenium (Se) in hair.
The analysis of selenium levels in hair allows assessment of the body's long-term selenium status. The test is used to identify selenium deficiency or excessive accumulation and forms part of a comprehensive evaluation of the body's trace element status.
Selenium plays an important role in immune system function, protection of cells against oxidative stress, and the normal functioning of the thyroid gland and reproductive system. It is a component of several enzymes involved in the body's antioxidant defense mechanisms. Selenium deficiency may be associated with reduced immunity, increased fatigue, and deterioration of hair and nail condition, while excessive selenium accumulation may also have adverse health effects.
The test is recommended in cases of suspected trace element imbalance, thyroid disorders, chronic fatigue, reduced immune defenses, and for monitoring selenium status during the use of dietary supplements or special diets.
The analysis is performed using a hair sample examined by high-precision chromatography. Since hair reflects the accumulation of trace elements over several months, the test provides information about long-term selenium intake.
No special preparation is usually required. Before sample collection, it is recommended to follow the laboratory's re-requirements for hair sampling and preparation.