Copper, Manganese, Cobalt, and Molybdenum Balance in Pre-adolescent Girls

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Abstract
Metabolic balance data were obtained on 36 pre-adolescent girls, aged 6 to 10 years, consuming measured intakes of diets varying in protein from predominantly animal to all-plant protein and varying in protein content so that intake per child ranged from 0.6 to 3.0 g/kg body weight. From food, fecal and urine analyses, estimates of daily dietary requirements for equilibrium for Cu, Mn, and Co were found to be 1.3 mg, 1.0 mg, and 7.7 µg, respectively. Suggested daily allowances for these elements are 2.5 mg, 1.25 mg, and 15 µg, respectively, based on estimates of growth needs, integumental losses, and reasonable margins of safety. Mo was found to be retained by all subjects when intakes approached 100 µg/child/day.