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  • Title: Relationship between the vitamin D content of maternal milk and the vitamin D status of nursing women and breast-fed infants.
    Author: Cancela L, Le Boulch N, Miravet L.
    Journal: J Endocrinol; 1986 Jul; 110(1):43-50. PubMed ID: 3755461.
    Abstract:
    This work was designed to study the effect of the vitamin D content of human milk on the vitamin D status of exclusively breast-fed infants, and the relation between milk and maternal serum concentrations of vitamin D during the first month of lactation. Serum levels of calcium (Ca), phosphorus (P), magnesium (Mg) and 25-hydroxyvitamin D (25-OH-D) were determined in a racially heterogeneous population of nursing women, between days 3 and 5 (L3), 15 and 18 (L15) and 30 and 45 (L30) post partum. The same parameters were determined in the serum of 1-month-old breast-fed infants. Maternal milk samples were obtained at L3, L15 and L30 and analysed for Ca, P, Mg, vitamin D and 25-OH-D content. Milk levels of Ca, P and Mg were found to be within the range previously described by other authors. No correlation was found between serum and milk levels of vitamin D and 25-OH-D in nursing mothers. The 25-OH-D concentration in milk was related to its vitamin D content and strongly correlated (P less than 0.001) with the 25-OH-D levels in the serum of exclusively breast-fed infants. No significant changes were observed in maternal serum levels of 1,25-dihydroxyvitamin D (1,25-(OH)2D3) measured at L3 and L30, or between maternal and infant levels of 1,25-(OH)2D3 at L30. This study emphasizes the importance of the 25-OH-D content of maternal milk, in being primarily responsible for the vitamin D concentrations found in the serum of exclusively breast-fed infants.(ABSTRACT TRUNCATED AT 250 WORDS)
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