Selenium is a mineral that can be obtained through water and foods. It is an essential nutrient for the body and is involved in numerous physiological processes. Selenium is found in varying amounts in different foods, and the selenium content of the soil can influence the levels of selenium in crops. The mineral is commonly found in crab, liver, fish, poultry, and wheat.
Selenium is used for various purposes, including supporting heart and blood vessel health, preventing certain cancers (such as prostate, stomach, lung, and skin cancer), and aiding in the function of the thyroid gland. It is also associated with benefits for conditions like osteoarthritis, rheumatoid arthritis, eye diseases, hay fever, infertility, cataracts, gray hair, abnormal pap smears, chronic fatigue syndrome, mood disorders, and more.
Selenium works by assisting antioxidant processes in the body and promoting proper functioning of many physiological mechanisms.