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Zinc deficiency depresses immunity, [237] but excessive zinc does also. [196] Despite some concerns, [238] western vegetarians and vegans do not suffer any more from overt zinc deficiency than meat-eaters. [239] Major plant sources of zinc include cooked dried beans, sea vegetables, fortified cereals, soy foods, nuts, peas, and seeds. [238]
Zinc deposits have been exploited for thousands of years: the oldest known zinc mine, in Rajasthan, India, was established nearly 2000 years BP. [6] Pure zinc was produced in the 9th century AD; earlier in antiquity zinc was primarily used to alloy with copper to produce brass. [7]
In 2019, 552,400 tonnes of zinc, 71 percent of US mined zinc production, and 4.2 percent of world zinc production, came from Teck Resources' Red Dog mine, the world's most productive zinc mine, in northwest Alaska, near Kotzebue. [2] [3] [1] The mine opened in 1989. [4] The zinc is shipped as concentrate to foreign smelters.
Zinc is a key mineral that helps our immune system and cell reproduction. Here's what you need to know about the mineral, and where it comes from. ... When zinc toxicity does happen, it has been ...
Zinc is mined as a mineral resource used by humans at a rate of 9800 Gg/yr [1] for use in metal alloys including brass and nickel silver, for galvanizing steel, and in zinc compounds such as zinc oxide. Half of zinc waste from industrial use is from tailings and slag; the rest comes from the oxidation of zinc metals and landfill waste ...
Zinc may help shorten the length and severity of a cold—and some even think it can prevent them. Experts weigh in and dispel any myths.
Like other essential vitamins and minerals, zinc supports overall health. But when it comes to curing colds and jump-starting weight loss, there’s a limit to what zinc can do.
Sphalerite is an important ore of zinc; around 95% of all primary zinc is extracted from sphalerite ore. [42] However, due to its variable trace element content, sphalerite is also an important source of several other metals such as cadmium, [43] gallium, [44] germanium, [45] and indium [46] which replace zinc.