Selenium

Selenium is an essential trace element that functions as a component of enzymes involved in antioxidant protection and thyroid hormone metabolism.

Deficiencies: Selenium deficiency is relatively rare in healthy, well-nourished individuals. It can occur in patients with severely compromised intestinal function. Selenium deficiency can lead to Keshan disease, which is potentially fatal. Selenium deficiency also contributes (along with iodine deficiency) to Kashin-Beck disease. These diseases are most common in certain parts of China where the soil is extremely deficient in selenium.

Food sources: The most important sources in American diets are meats, fish, and grains. Brazil nuts can have relatively high selenium concentrations.

2000-Calorie Diet Recommendations

Shown below are the reference numbers used to compute the Daily Value percentages that appear on the Nutrition Facts labels on foods sold in the U.S. These numbers are meant to approximate the nutrients needed for the average person consuming 2000 calories per day.

Click any of the vitamin or nutrient names below to learn more about the importance of each element, and to see detailed dietary allowances for specific population groups.

***Daily Value recommendations are based on a 2000-calorie diet. Recommendations for individuals will vary depending on gender, age, weight, and other factors.