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Results for analyses conducted on various samples of geophagical materials obtained from several countries are shown in the Table 6.
 
Results for analyses conducted on various samples of geophagical materials obtained from several countries are shown in the Table 6.
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[[TABLE 6]]
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{| class="wikitable"
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|-
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|+ Table 6: Extractable concentrations (mg kg-1) of selected macro- and micronutrients determined from geophagical materials collected within Africa.
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|-
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! Date of Study and Origin of Sample || Calcium || Copper || Iron || Potassium || Magnesium || Manganese || Sodium || Zinc
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|-
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| 1966, Nigeria<sup>a</sup> || 3,910 || - || - || 53 || 2,005 || - || 44 || -
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|-
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| 1971, Ghana || 120 || - || - || 165 || 31 || - || - || -
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|-
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| 1973, Ghana<sup>b</sup> || 1,133 || 10 || 95 || 130 || 331 || <1 || - || 15
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|-
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| 1984, Nigeria<sup>c</sup> || 265 || 0.6 || 134 || 41 || 179 || 29 || - || 30
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|-
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| 1991, Cameroon || 77 || - ||9 || 45 || - || - || - || -
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|-
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| 1991, Gabon || 68 || - || 4 || 87 || - || - || - || -
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|-
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| 1991, Kenya 1 || 791 || 2 || 7 || 432 || 35 || 163 || – || 3
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|-
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| 1991, Kenya 2 || 220 || 1 || 12 || 793 || 113 || 349 || - || 5
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|-
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| 1991, Nigeria || 19 || 2 || 10 || 102 || 9 || nd || - || 3
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|-
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| 1991, Togo || 120 || - || 5 || 177 || - || - || - || -
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|-
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| 1991, Zambia<sup>d</sup> || 142 || 11 || 74 || 93 || 60 || 19 || - || 2
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|-
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| 1997, Uganda<sup>e</sup> || 1,341 || 2.1 || 528 || 763 || 458 || 59 ||186 || 6.7
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|}
    
====Dangers of Geophagy====
 
====Dangers of Geophagy====

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