Hair zinc concentration was determined by atomic absorption spectrophotometry in 308 normal neonates and in 119 normal infants aged 1 to 12 months. Hair zinc concentration declined from 204 μg/g at birth to 112 μg/g at age 8 months, and then rose to 144 μg/g at age 12 months. Breast-fed infants had higher hair zinc than formula-fed infants.
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