Selenium is an Oligotherapy preparation. A very powerful antioxidant and a preventative action against cardiovascular diseases, also useful in treating asthma. It plays a role in forming certain proteins (including those in sperm and prostate cells) and in thyroid glandular activity. It is also involved in our immunity defense process and may have a beneficial effect on mood swings and even depression. Medicinal ingredients (for 1 teaspoon): Selenium (Sodium selenite)………………………… 20 µg Non-medicinal ingredients: Purified water, Glycerol, Potassium sorbate. Adults (19 years and older): Take 1 teaspoon once a day, in the morning in a small amount of water, for 1 to 2 months or as directed by your healthcare practitioner.