What is it?

Selenium is a trace mineral needed for the production of the antioxidant enzyme glutathione peroxidase. It is primarily needed for immune system health; antioxidant protection; liver health; heart health and joint care; thyroid hormone production, male fertility and prostate protection.

Function How it helps

Selenium is an important component of glutathione peroxidase, which protects cells from free radical damage. It also acts with vitamin E as an antioxidant protecting fats and cell membranes.

Detox and liver support Glutathione is needed by the liver to help elimation toxic compounds from the body. Selenium binds to mercury helping to protect against it’s toxic effects.
Cardiovascular health Selenium helps maintain the correct balance of HDL and LDL cholesterol, protects against excessive blood clotting and reduces cholesterol deposits. It also works with vitamin E to prevent oxidation of fat and cholesterol in the arteries.
Immune Health Low selenium levels weakens the function of the thymus, the master gland of immunity and suppresses white blood cell activity.


What is it used for?

Protection against free radicals

Cardiovascular health Immune dysfunction
Liver protection Arthritis and various other inflammatory conditions

Elimination of and/or protection against heavy metals (i.e. cadmium, mercury, lead)

Male fertility problems

Cell protection



Best food sources
Brazil nuts Butter Liver
Shellfish Fish Apple cider vinegar
Whole wheat Oats Brown rice
Yeast Milk


Deficiency Symptoms

Liver necrosis

Psoriasis eczema

Eye problems
Cardiomyopathy Toxic overload Immunity problems
Arthritis Heavy metal toxicity Thryoid disfunction

Supplementation dosage range

50-400ug per day


Other information

Deficiency is common in many parts of the world, including the UK due to poor soil levels of selenium Deficiency can cause heart muscle wastage and joint inflammation and it is strongly linked to increased risk of cancer, heart diseases and other degenerative diseases.

Generally it is recommended for its antioxidant protective effects against diseases such as heart and brain disorders, joint disease, liver conditions and cancers.

Selenium and vitamin E enhance each others antioxidant properties.


Yeast-derived selenium supplements should not be used by patients taking monoamine oxidase (MAO) inhibitors unless on the advice and under the strict monitoring of a physician. Yeast-free selenium supplements can be used as an alternative.

Selenium supplementation at very high doses can cause problems with nails and hair, but the levels in typical supplements do not pose a problem.


Factors which deplete levels, impair absorption and/or inhibit activity:

Vitamin C in very high doses

Zinc in very high doses

Heavy metals, (lead, mercury, cadmium)

Chemotherapy drugs



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