(Ni, latin Niccolum)
The importance of nickel for life was first discovered in the late sixties of the last century. Until then the nickel was observed only in terms of its toxicity to the body. The nickel was seen as »possible« essential trace element for humans, but its role in the body is mainly unknown. The highest number of researches related to the role of nickel in the body is made on chickens and rats.
It is believed that the human body has about 10 miligrams of nickel.