Selenium is a trace element for human beings and many other animals. It is absolutely necessary in minute quantities but toxic in high amounts. This dietary mineral is indispensable to human health as it is present in numerous chemical reactions. Endogenous compounds that contain this element are implicated in antioxidant defenses, immune responses, cardiovascular health, and muscle metabolism.
Improves Antioxidant Defense
Cellular respiration is the process responsible for energy production within cells throughout the body. Unfortunately, they produce harmful byproducts called free radicals. Selenium is arguably the oldest chemical element to show antioxidant function in animal tissue. In the human body, it raises the levels of endogenous antioxidants, including glutathione, and reuses dietary antioxidants, such as vitamin C.
Maintains Cardiovascular Health
Healthy levels of selenium in the blood contribute to cardiovascular health. Laboratory studies have shown that this mineral nourishes the cells that line the inner wall of blood vessels, and helps protect the cells present in the heart. Also, it has a protective effect on lipids and free fatty acids found in the systemic circulation. It prevents them from lipid peroxidation brought on by reactive nitrogen species.
Enhances Immune Responses
In the past few years, scientific research has uncovered so much about the nutritional significance of selenium. In addition to its known role in the prevention of oxidative stress and the reversal of radical damage, it is also incorporated into proteins that are involved in immune responses. In fact, it has been observed that high levels of selenium reduce morbidity in people suffering from AIDS or cancer.
Promotes Healthy Metabolism
There is consensus in the scientific community that selenium is utilized by the thyroid glands in the synthesis of thyroid hormones and their conversion into their active forms. Selenium takes part in regulating metabolic processes together with the dietary mineral iodine. Its presence in the systemic circulation provides a ready supply of endogenous compounds required for a healthy metabolism.
Modulates Sperm Production
Oxidative stress interferes with the production of healthy sperm. It has been reported that selenium plays a central role in countering reactive oxygen species that specifically cause radical damage to proteins necessary for sperm production and essentially reduce sperm count through oxidative stress. More importantly, selenium is incorporated into structural proteins that make up mature sperm cells.
Strengthens Physical Capacity
Selenium is certain to benefit people living an active lifestyle. It is one of the minerals that promote muscular strength and physical endurance, and as such it has often become a part of supplements for endurance athletes and body builders. Due to its antioxidant role, it promotes cellular longevity and increases energy levels. Dietary selenium nourishes muscle tissue as it is a constituent of proteins found in the muscle cells.
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