Free Shipping on Orders Above $25
× SuperSmart Learn by health topic New articles Popular articles Visit our shop My account Smart Prescription Blog Loyalty program Language: English
Tiredness and Lack of energy Features

Selenium: what are its benefits and in which foods is it found?

Selenium is both a trace element and a bio element that is absolutely essential for health. What exactly is it, what does it do and where is it found?
Offal, shrimps, eggs and nuts rich in selenium
Essential for health, selenium is found in a variety of different foods.
Rédaction Supersmart.
2020-09-02Commentaires (0)

A highly specific metalloid trace element

Selenium is a chemical element with the symbol Se, discovered by Swedish chemists in the 19th century. It is closely related to tellurium, a compound named after Tellus, the Roman goddess of the earth. Similarly, the name selenium is taken from Selene, the Roman goddess of the moon.

Light-sensitive, selenium has been used for many years to produce the photoelectric light meters in cameras and is still used for making photovoltaic or solar cells. In dermatology, selenium sulfide is used as anantifungal, etc. In short, it’s a remarkable metalloid with multiple properties.

It took several years of research before it was discovered that selenium was naturally present in soil everywhere in the world to a greater or lesser degree. This is how it finds its way into our diet: it is first taken up by plants and then by the animals that eat them.

An antioxidant, pro-immunity mineral, good for the hair and nails ...

Which is obviously a good thing, given that it’s essential for normal physiological function.

In fact, it is a precursor of certain enzymes the key function of which is to scavenge free radicals. As such, selenium plays an important role in promoting the longevity of our cells, which is why it’s considered to be one of the most powerful antioxidants you can consume. (1-2).

According to the European Food Safety Authority, selenium helps to:

Which foods are high in selenium?

The best source is seafood: monkfish, oysters, mackerel, tuna, sardines, mussels, scallops, and lobster are all high in selenium.

It is also found in meat, offal and eggs, as well as in oilseeds and nuts such as macadamia nuts, hazelnuts and almonds.

However, the precise levels of selenium in each of these foods is usually impossible to predict. Knowing exactly how much selenium is provided by a particular foodstuff requires detailed analysis. Indeed, the amount of selenium present in food depends on its level in the soil and distribution of selenium is uneven.

Daily intake and selenium supplements

The recommended daily intake of selenium is normally around 200 mcg.

We’d therefore recommend the supplement L-Selenomethionine which provides exactly this amount each day.

Note: selenium supplements should not, however, be taken continuously or at excessive doses.


  1. Selenium and human health, Prof Margaret P, Rayman DPhil, The Lancet, Volume 379, Issue 9822, 31 March–6 April 2012, Pages 1256-1268
  2. https://efsa.onlinelibrary.wiley.com/doi/epdf/10.2903/j.efsa.2009.1220
  3. The role of selenium in thyroid hormone metabolism, John R. Arthur, Revue canadienne de physiologie et pharmacologie, 1991, 69(11): 1648-1652, https://doi.org/10.1139/y91-243


You must be connected to your account to leave a comment
Be the first to review this article
Our selection of articles
Common nettle Urtica dioica
Health: the impressive benefits of nettle supplements

Nettle is a plant that grows abundantly along country lanes. Your bare legs may not appreciate being stung by it, but nettle is actually full of health virtues when you know how to use it .... Discover its benefits now.

Adult handing on planet Earth to a child
Ecology: which are the best supplements when it comes to respecting the environment?

Supplement manufacturers are also acting to safeguard our beautiful blue planet. Discover the most eco-friendly supplements for helping to reduce your carbon footprint and impact on the world’s ecosystems.

Women benefiting from an Ayurvedic massage
The world’s traditional systems of medicine (Ayurvedic, Chinese, African ...)

Practised for thousands of years, traditional systems of medicine still have much to teach us. Discover the principles, uses and main ingredients of the great ancestral systems of medicine.

Grandmother making natural remedies in her kitchen
10 of grandma’s health tips you should definitely know about … and pass on

A grandmother’s advice can be invaluable. Discover 10 essential, traditional remedies for relieving many everyday health niggles and staying on top form.

Tomatoes, almonds and other sources of potassium
Top 10 potassium-rich foods

Discover the top ten foods with the highest content of potassium, the mineral that supports normal nervous system and muscle function. Do you know which food takes the number 1 spot?

Golden root of the anti-depressant Rhodiola rosea
Rhodiola: benefits and dosage of the famous ‘golden root’

An adaptogen plant used for centuries by those living in cold climates, rhodiola offers many advantages for health. Discover now the benefits of this arctic root, a plant of significant scientific interest.

Products which must be of interest

Daily 3® Multivitamin SupplementDaily 3® Multivitamin Supplement

The most complete multivitamin supplement you can take in a single capsule

Daily 6®Daily 6®

Contains 55 ingredients! An exceptionally broad spectrum multi-nutrient for optimal health.

Daily 2® Timed ReleaseDaily 2® Timed Release

Multivitamin formulation with sustained release

Liposomal Vitamin CLiposomal Vitamin C

Highly-bioavailable form of vitamin C

Magnesium Orotate Magnesium Orotate

Highly-bioavailable form of magnesium


The most active form of vitamin B12, used primarily to regenerate neurons.

Adaptogenic PotionAdaptogenic Potion

Ayurvedic potion to boost immunity and relieve stress

Annatto TocotrienolsAnnatto Tocotrienols

Beneficial for cardiovascular health. 90% delta-tocotrienols, the most biologically active form of vitamin E.

© 1997-2021 Fondation pour le Libre Choix. All rights reserved
© 1997-2021 Fondation pour le Libre Choix. All rights reserved