Selenium

Overview:

Selenium is a trace mineral essential for various bodily functions, including antioxidant defense, thyroid hormone metabolism, and immune function.

Sources:

Selenium is found in foods such as Brazil nuts, seafood, meat, eggs, and cereals. It is also available in supplement form, often as selenium selenite or selenomethionine.

Functions:

Antioxidant Protection: Selenium is a component of glutathione peroxidase, an enzyme that protects cells from oxidative damage.

Thyroid Health: It plays a crucial role in the synthesis and metabolism of thyroid hormones.

Immune Function: Selenium supports the immune system by enhancing the proliferation and function of white blood cells.

Deficiency:

Selenium deficiency can lead to Keshan disease (a type of cardiomyopathy), Kashin-Beck disease (a type of osteoarthropathy), and compromised immune function. Symptoms may include muscle weakness and fatigue.

Toxicity:

High doses of selenium can cause selenosis, characterized by symptoms such as gastrointestinal distress, hair loss, white blotchy nails, and mild nerve damage. It is important to adhere to recommended dosages.