Summary

Selenium (FatSol) [DV ~ 72μg] {Half Life = 8 Hours} An essential trace mineral that supports many bodily processes such as improved cognition, immune system function, and fertility. It plays a key role in maintaining thyroid hormone metabolism (helps with hypothyroidism and hashimotos), DNA synthesis and protecting the body from oxidative damage and infection. This trace mineral works in conjunction with vitamin E to help prevent oxidative damage in the body. Selenium is also a powerful antioxidant that has anti-inflammatory properties. It is a vital nutrient for thyroid function. Studies show that increasing selenium in those with Hashimoto’s {an autoimmune thyroid condition} decreased thyroid antibodies.

Selenium can be harmful in excessive amounts [>400μg/day].

Selenium is a trace mineral that plays a crucial role in various biological functions. It is a component of several essential enzymes and proteins, particularly selenoproteins, which are vital for numerous bodily processes. Selenoproteins are involved in antioxidant defense mechanisms, thyroid hormone metabolism, and immune function.

This mineral is known for its antioxidant properties, helping to protect cells from damage caused by free radicals. Free radicals are unstable molecules that can cause oxidative stress, leading to chronic diseases such as cancer and heart disease. By neutralizing these free radicals, selenium contributes to the prevention of cellular damage and supports overall health.

Selenium is also essential for proper thyroid function. It is a critical component of the enzymes that regulate thyroid hormones, which in turn control metabolism, growth, and development. Adequate selenium levels ensure that the thyroid gland operates efficiently, producing hormones in the right amounts.

The immune system also benefits from selenium. It enhances the production and function of white blood cells, which are the body's primary defense against infections and diseases. This mineral's role in immune response is particularly important in protecting against viral infections .

Dietary sources of selenium include Brazil nuts, seafood, meats, cereals, and grains. The selenium content in plant-based foods depends significantly on the soil in which they are grown. Regions with selenium-deficient soils may produce crops with lower selenium levels, affecting the dietary intake of the population.

While selenium is vital for health, it is required only in small amounts. Both selenium deficiency and excess can have adverse effects. Deficiency in selenium can lead to conditions like Keshan disease, a heart disorder, and Kashin-Beck disease, a type of osteoarthritis. On the other hand, excessive selenium intake can cause selenium toxicity, or selenosis, with symptoms including gastrointestinal distress, hair loss, and neurological damage.

The recommended daily intake of selenium varies by age, sex, and life stage, but generally, it is in the range of 55 micrograms for adults. Ensuring an adequate but not excessive intake of selenium is key to maintaining its health benefits without encountering its toxic effects.

In summary, selenium is an indispensable mineral with significant roles in antioxidant protection, thyroid function, and immune response. Obtaining selenium from a balanced diet helps support these critical functions, contributing to overall health and well-being. Care must be taken to maintain appropriate levels to avoid the risks associated with both deficiency and toxicity.