Selenium explained

Learn more about selenium and how it functions as an antioxidant and plays a role in managing thyroid hormone production.

Selenium is a trace mineral involved in a number of roles in the body, including:

• antioxidant support to reduce free radicals in the body but not only does it act as an antioxidant on its own, it is also part of an antioxidant enzyme called glutathione peroxidase
• thyroid hormone metabolism
• maintaining testosterone formation to support prostate health as well as protecting the prostate from free radical damage
• supports a healthy pregnancy
• glutathione enzyme may be beneficial as we age as by maintaining the clarity of the lens in the eye and may help to preserve eye health

Emerging research also suggests a low intake of selenium may contribute to a decrease in cognitive function in the elderly.

In Australia and New Zealand, the main dietary sources are seafood, poultry and eggs and, to a lesser extent, other muscle meats.

Plant sources include brazil nuts, whole grains, sunflower seeds and mushrooms.

As low soil levels suggest our intake may be lower than in other countries, many people are showing a deficiency. 

Recommended daily intake for adults from the Australian NRV

If you do not get enough selenium in your diet or have a need for a higher therapeutic dose, please check with your health professional what supplementation might be suitable.