Selenium is a metalloid whose physicochemical properties are similar to those of sulfur. It can substitute for sulfur in sulfur amino acids to form compounds analogous selenium..

Most of the biological functions of selenium pass through selenoproteins. Selenium is involved in the detoxification of xenobiotics and heavy metals. Its role as a modulator of inflammatory and immune responses is essential.

The efficiency of absorption of selenium is high (50-95%) and depends on its chemical form elementary. The excretion of absorbed selenium is in the form of methylated derivatives and predominantly by the kidney (60%). There is a conservation of selenium will be directed primarily to certain organs (brain, endocrine glands ...) if low intakes.

Sources of Selenium

See the list of foods that provide the most selenium


The 100% value in the RNI Nutrimeter ® is 1 mg per kilogram of body weight per day. A value of 5 micrograms per kilogram of body weight per day (RNI value of 500% in the Nutrimeter ®) is defined as the dose does not induce any deleterious risk for a lifetime.

Given the biodiversity of the selenium in food intake of 40-50 mg per day recorded in France could match the minimum requirement (we'll RNI value of 50% in the Nutrimeter ®)

(Source: "Recommended dietary allowances for the French population," the CNERNA-CNRS. Edition coordinated by Ambroise Martin.)