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Definition English:
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Large class of micronutrients, most considered essential. Macro minerals such as calcium and phosphorus are required in amounts greater than 100 mg/day. The trace elements such as iron and selenium are necessary in minor amounts. The ultratrace elements are necessary in amounts expressed in micrograms/day. (http://www.britannica.com/EBchecked/topic/422896/human-nutrition/250647/Minerals?anchor=ref869440) |