Selenium content of NZ
soil is quite low in comparison to other countries, and consequently selenium
status is low in New Zealanders, but it appears that we have adapted to this.
Selenium is important in the control of thyroid hormone metabolism, reproduction
and immune function and it is needed to make seleno-proteins. Thus, it’s not
surprising that selenium deficiency is associated with decreased immunity,
lowered reproductive capacity, and reduced thyroid function.
The RDI (recommended daily intake) for selenium for
women aged 14-50 is 60µg and 70µg for men aged 14-50. Good sources of selenium
include fish, seafood, meat, poultry, eggs, Brazil nuts and bread. Smokers need
more selenium than non-smokers do, because smoking increases their need for antioxidants,
selenium included.