Mineral Deficiencies and Excesses
Zinc was first shown to be essential for growth of living organisms in 1869. In 1934, it was shown to be essential for growth and normal development of mammals (Todd et al., 1934). In 1940, the first metalloenzyme containing zinc was isolated (Keilin and Mann, 1940) and since then several other enzymes have been shown to contain zinc (Parisi and Vallee, 1969). Recently, it has been reported that zinc and iron are nutritionally interrelated. The highest concentration of zinc in the body was found in layers of the choroid in the eye. This layer contains an enzyme retinene reductase which is a zinc metalloenzyme.
KeywordsZinc Toxicity Dust Dopamine Sludge
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