August 02, 2024

Selenium

What is Selenium?

Selenium is an essential trace mineral that is crucial for the proper functioning of human and animal bodies. It plays a significant role in various biological processes, including antioxidant defense and thyroid hormone metabolism.

What are the Benefits of Selenium?

Selenium offers several health benefits:

  • Antioxidant Properties: Protects cells from oxidative stress.
  • Thyroid Function: Supports the production of thyroid hormones.
  • Immune System: Enhances immune response.
  • Cognitive Health: May reduce the risk of cognitive decline.
  • Heart Health: Linked to a lower risk of cardiovascular diseases.

What Research is on Selenium?

Research on selenium focuses on its biological roles, dietary sources, deficiency-related diseases, and the impact of supplementation. Studies have shown selenium's importance in preventing oxidative stress-related diseases, supporting thyroid function, and its potential in reducing cancer risk.

What is the Mechanism of Action for Selenium?

Selenium exerts its effects primarily through selenoproteins, which are vital for various cellular functions. These proteins participate in antioxidant defense, thyroid hormone metabolism, and redox signaling, thereby maintaining cellular health and homeostasis.

What is the Typical Dosage of Selenium?

The recommended dietary allowance (RDA) for selenium varies by age and sex. For adults, the RDA is 55 micrograms per day. It's important to avoid excessive intake, as high doses can be toxic.

What Foods are Rich in Selenium?

Foods high in selenium include:

  • Brazil Nuts: Among the richest sources.
  • Seafood: Such as tuna, sardines, and shrimp.
  • Meat: Including beef, turkey, and chicken.
  • Grains: Like brown rice and whole wheat bread.
  • Eggs: Also provide a good amount of selenium.

Kieliszek, Marek, and Sayra N Serrano Sandoval. “The importance of selenium in food enrichment processes. A comprehensive review.” Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements (GMS) vol. 79 (2023): 127260. doi:10.1016/j.jtemb.2023.127260