Selenium is a nutrient necessary for good health. It supports reproductive health, the thyroid, DNA production, defense against infections, and more. Selenium deficiency can lead to heart disease, infertility, and arthritis and may be related to cardiovascular disease, cancer, and cognitive decline.

The Medical News Today website advises eating these foods that are rich in selenium: 

Brazil nuts, tuna, halibut, sardines, shrimp, turkey, beef liver, chicken, cottage cheese, brown rice, eggs, whole wheat bread, and baked beans.