Selenium is stored in the body in the thyroid gland, liver, muscles, kidneys, and male and female gonads.
It is incorporated into proteins and has mainly antioxidant and anti-inflammatory properties. It is necessary for the synthesis of thyroid hormones and in preserving the reproductive health of men, and it also contributes to maintaining the health of the skin, hair, and nails.
The main sources of selenium are meat, fish, and seafood, and the highest content of selenium is found in Brazil nuts.
Selenium deficiency manifests itself in a weakened immune system and cognitive decline. When supplementing selenium with dietary supplements, one should be extremely careful because the border between therapeutic and toxic doses is low, and poisoning can easily occur, manifested by nausea, vomiting, and hair loss.