A Comparison of Protein Concentrations and Energy in Breast Milk from Preterm and Term Mothers

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Abstract
The concentrations of milk specific and plasma proteins were compared in milk from mothers of preterm and term infants. Energy content was also determined. Immunoglobulin A was significantly increased in preterm milk, but there was no difference in the concentration of any other proteins or in the energy content. Both protein and energy varied to a greater extent in samples of preterm milk. We propose a hypothesis to explain the higher concentration of total nitrogen reported in preterm milk.