Explore our alphabetical guide and discover why you need them, where you can get them and how to catch a deficiency before it catches you. Just click on a letter, and scroll down.
Selenium is an antioxidant and is associated with the metabolism of fat.
Deficiency A deficiency is rare in humans, and takes years to develop. Although not much is scientifically known about silicon, it is considered an essential trace element. It appears to be involved with collagen and elastin, as well as in the calcification of bones and the composition of cartilage. There are no known cases of silicon deficiency. It is thought that symptoms of a possible deficiency are certain joint disorders, due to silicon's role in bone and cartilage composition.