Medically reviewed by Allison Herries, RDN Selenium supports thyroid and immune health, and its deficiency is rare but ...

An estimated 500 million to 1 billion people worldwide are affected by selenium deficiency, according to the World Health Organization (WHO). Researchers at Wageningen University & Research (WUR), ...

Selenium-rich foods, from Brazil nuts to tuna, help maintain thyroid hormone balance, antioxidant defenses, and immune function when consumed in safe amounts. Balancing intake matters: too little ...

Selenium is a trace mineral that our bodies need to maintain good health. It's found naturally in soil and many foods. Consuming selenium helps with thyroid function, immune health, and defends our ...