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Selenium Selenium 100mcg 300 caps.
15.56 $


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From 3 units only 15.24 $ /Units.

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  • Effectively assimilable selenium form
  • Without the addition of yeasts
  • Prevents deficits
  • Influences procreation
  • Intensifies thyroid hormone conversion
  • Neutralizes oxidative stress
  • Helps to maintain healthy hair and nails
  • May increase resilience to infections
  • Anticancer prophylaxis

Swanson Selenium is a dietary supplement containing 100 mcg of l-selenomethionine in one capsule.

Selenium – a trace element discovered by a Swedish chemist Berzelius in 1817. For almost one century it didn’t arouse larger interest among scientists because of its scarce occurrence. It was mistakenly believed that it has only toxic effect on humans. Currently, selenium is quite well-known mineral and according to scientific knowledge it plays a very important role in the functioning of the human organism.

Thyroid hormone conversion
In order to protect yourself from the symptoms of hypothyroidism, which currently is so common, you should take care not only about efficient hormone production by thyroid, but also about efficient conversion of metabolically inactive hormone in its active version.

Thyroid produces thyroxine (T4) at the amount of around 80% and triiodothyronine (T3) in only 20%, which makes the main source of triiodothyronine the conversion in peripheral tissues. To transform T4 into T3 it is necessary to disconnect one iodine molecule, for which special enzymes are responsible – deiodinases. As it turns out, selenium is a component molecule of these enzymes and plays an incredibly important role in maintaining their high efficiency.

Glutathione peroxidase
The titular enzyme is one of the most important factors which are influenced by selenium supply. It is an oxygenated form of glutathione, which is the main endogenous antioxidant. Glutathione peroxidase is responsible for neutralizing peroxides, among others hydrogen peroxide.

Peroxide reduction is another important factor for the health of thyroid gland. During the process of iodine conversion to the form able to build thyroid hormones, hydrogen peroxide is produced, as a byproduct. It may destroy the structure of thyroid tissue, which makes it worth taking care about its efficient naturalization.

Free oxygen radicals reduction
Selenium helps in the efficient removal of reactive oxygen forms, which are intensively produced during many biochemical reactions in our organism. Their excess may be the cause of faster aging of the organism because of damaging healthy cells. Oxidative stress reduction is one of the main aspects, that people aiming at longevity take care of.

Immunity to infections
The increase of lymphocytes and macrophages production simulated by selenium may contribute to strengthening defense line of the organism against microorganisms and improve immunity. It is an important matter, especially during the period of fall and winter, when our immune system, due to frequent exposures to low temperatures may have a tough task to perform.

Diseases related to selenium deficits
The country, in which the intake of selenium is exceptionally low is China, therefore the majority of observations regarding selenium deficits is carried out there. Statistical Chinese’s intake of this element with a diet is only 50% of the recommended supply.

The two diseases directly related to selenium shortages is Keshan and Kashin-Beck disease. The first one means cardiomyopathy, therefore deficits are especially dangerous for people with the increased risk of heart diseases. The second is joint cartilage dystrophy.

An important matter is also the influence of selenium on fertility in men. It turns out that this element has a wide influence on the process of spermatogenesis and its shortage may entail worse quality of sperm and eventually infertility.

We cannot skip the fact of frequent cancer developments, correlated to low selenium supply. Cancers are related to the lack of this mineral and may attack especially prostate, head and neck, lungs and breasts. Cancer diseases touch more and more people, therefore it is worth paying special attention to its prophylaxis, at the state when we don’t have any problems yet.

Lack of yeasts
In dietary supplements containing selenium usually there is this element obtained from yeasts. Unfortunately it is a strong and frequent allergen, therefore for many people these supplements may be problematic. In the case of Swanson’s supplement, we don’t need to worry about yeasts, as the raw material used to production is free from them.

The form of selenium contained in the supplement, which is l-selenomethionine, enjoys especially good opinion, because of its great assimilability. It is a molecule engaging selenium with amino acid – methionine, in which selenium occupies around 40% of the mass.

Swanson Selenium is recommended to people dealing with hypothyroidism, Hashimoto’s disease and those who complain about weak immunity and excessively frequent infections. The effects are especially visible among people with selenium deficits diagnosed in blood tests. 

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Container size: 300 capsulesServing size: 1 capsuleServings per container: 300
per 1 capsuleamount%DV
Selenium (from Selenium SeLECT® L-selenomethionine)100 mcg182%

Other ingrednients

Rice flour, Capsule (gelatin), Acidity regulator (Dicalcium phosphate).

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Selenium (element, chemical symbol Se, atomic no. 34, from chalcogenide, it is present in several allotropic forms). It is supplied the body with food in the form of seleno-amino acids (selenomethionine - gathering supplies, and selenocysteine – a component of glutathione peroxidase, deiodinase and seleno-proteins). Regulates the functioning of the thyroid gland. It affects the growth and development, including sexual development (by increasing production and sperm motility). It affects the flexibility of the tissue, removes some of the toxins from the body and destroys cancer cells and reduces the severity of menopause in women. Natural products containing selenium are seafood (sea fish, oysters, bladderwrack) and vegetable products (broccoli, onions, wheat germ, bran, tomatoes) and animal products (poultry, eggs). It is also included in the composition of vitamin-mineral and mineral supplements. Selenium supplementation is recommended as a dietary supplement of active people having diet poor in this element, and as a factor increasing the body's immunity.
Selenium deficiency increases the risk of developing cancer and heart disease. Symptoms of selenium deficiency are: cardiomyopathy, growth stoppage,
disorders of detoxification processes which may lead to damage to the kidneys and liver.
An excess of selenium can lead to selenosis (the disease, the symptoms are: loss of hair, nail cracks, lesions).
demand of selenium for pregnant women 65 mcg; nursing mothers 75 mcg; men 7 mcg.



Exogenous methionine is an amino acid containing sulphur in its composition. It provides multi metabolism, with the indispensable help of vitamin B6. Participates in the synthesis of phospholipids (e.g. Lecithin), carnitine responsible for transport in the body of long-chain fatty acids, burned in the mitochondria cells (organelles in cells with a separate kernel), along with cystine forms cysteine. It is in the body antioxidant function. Natural source of acquisition of methionine are high-protein foods of animal origin (eggs, meat, fish), vegetable (sesame seeds, grain products). Available in all protein and carbohydrate protein and amino acid supplements such EAA and contain so-called all-day amino acids, supporting the liver preparations and cosmetics supporting the growth and condition of hair, skin and nails.


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