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. 2014 May 8;25:10.3402/mehd.v25.24145. doi: 10.3402/mehd.v25.24145

Table 3.

The most distributed deficiencies of essential minerals in the human diet

The necessary amount of microelements (mg/daily) Number of people (billions) with microelement deficiency Microelements quantity (mg/kg) in the gut microbe biomass
Zinc 30.0 4.5 499.6±54.4
Copper 2.0 3.6–3.8 46.9±4.4
Chrome 0.15 3 1.44±0.15
Iron 20.0 1 584.9±120.2
Iodine 0.15 1 2.8±0.43
Selenium 0.1 1 1.73 + 0.17