Sir.—I read with great interest the article by Specker et al.1 They have shown that despite very low vitamin D levels in the breast milk of black mothers (3.6 pg/mL), as compared with those of white mothers (22.3 pg/mL), 25-hydroxyvitamin D (25-OHD) levels were nearly the same in both groups (black mothers, 30.6 pg/mL; white mothers, 41 pg/mL). However, mean serum 25-OHD concentrations of black infants (20 ±6 pg/mL) and white infants (34 ±5 pg/mL) did not indicate vitamin D deficiency despite their diets not being supplemented with vitamins.
Normal 25-OHD levels, especially of black infants, might suggest that the absorption of vitamin D and specifically that of 25-OHD in breast milk should be studied. If it is shown that absorption of 25-OHD in breast milk is much better than that in formula, as in the case of iron in breast milk, the protective effect of it from
ÖZSOYLU Ş. Race, Breast Milk, and Vitamin D. Am J Dis Child. 1986;140(6):506. doi:10.1001/archpedi.1986.02140200016013