Common Agricultural Policy makes us unhealthy, infertile and stupid.
The mineral, mainly obtained from wheat and other cereals but also brazil nuts, occurs naturally in the soil but only at low levels in Britain.
As a result consumption levels of selenium in the UK are about half what they should be.
Selenium is important to the immune system - especially for combating viruses such as the ones that cause flu - and hormone production.
It also reduces the risk of heart disease and certain types of cancer, notably prostate. In old age, selenium is believed to help the brain remain sharp and active.
(Luckily I eat Organic Weetabix every morning which is made from Canadian wheat, which makes it taste better than normal Weetabix. And no comments about what an odd choice of breakfast that is. One Weetabix with Kellogg's Cornflakes on top in a hemispherical bowl, topped with unrefined Muscovado sugar and semi skimmed milk, eaten with an Old English pattern spoon has been my breakfast nearly everyday for thirty years, it is only when the wrong sort of spoon or bowl or one of the ingredients isn't available that I haven't and then spend the whole day depressed... OCD? what OCD....)