Original Article

Journal of Perinatology (2016) 36, 897–900; doi:10.1038/jp.2016.88; published online 2 June 2016

The effect of pasteurization on trace elements in donor breast milk

N Mohd-Taufek1, D Cartwright2,3, M Davies2,3, A K Hewavitharana1, P Koorts2,3, H McConachy2, P N Shaw1, R Sumner4 and K Whitfield1,2

  1. 1School of Pharmacy, The University of Queensland, Brisbane, QLD, Australia
  2. 2Grantley Stable Neonatal Unit, Royal Brisbane and Women’s Hospital, Metro North Health Services District, Herston, QLD, Australia
  3. 3Department of Paediatrics & Child Health, The University of Queensland, Brisbane, QLD, Australia
  4. 4Inorganic Chemistry Laboratory, Queensland Health Forensic and Scientific Services, Coopers Plains, Brisbane, QLD, Australia

Correspondence: Dr K Whitfield, School of Pharmacy, The University of Queensland, PACE Precinct, Building 870, Brisbane, QLD 4072, Australia. E-mail: karen.whitfield@uq.edu.au

Received 1 September 2015; Revised 19 April 2016; Accepted 21 April 2016
Advance online publication 2 June 2016

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Abstract

Objective:

 

Premature infants often receive pasteurized donor human milk when mothers are unable to provide their own milk. This study aims to establish the effect of the pasteurization process on a range of trace elements in donor milk.

Study Design:

 

Breast milk was collected from 16 mothers donating to the milk bank at the Royal Brisbane and Women’s Hospital. Samples were divided into pre- and post-pasteurization aliquots and were Holder pasteurized. Inductively coupled plasma mass spectrometry was used to analyze the trace elements zinc (Zn), copper (Cu), selenium (Se), manganese (Mn), iodine (I), iron (Fe), molybdenum (Mo) and bromine (Br). Differences in trace elements pre- and post-pasteurization were analyzed.

Results:

 

No significant differences were found between the trace elements tested pre- and post-pasteurization, except for Fe (P<0.05). The median (interquartile range, 25 to 75%; μgl−1) of trace elements for pre- and post- pasteurization aliquots were—Zn: 1639 (888–4508), 1743 (878–4143), Cu: 360 (258–571), 367 (253–531), Se: 12.34 (11.73–17.60), 12.62 (11.94–16.64), Mn: (1.48 (1.01–1.75), 1.49 (1.11–1.75), I (153 (94–189), 158 (93–183), Fe (211 (171–277), 194 (153–253), Mo (1.46 (0.37–2.99), 1.42 (0.29–3.73) and Br (1066 (834–1443), 989 (902–1396).

Conclusions:

 

Pasteurization had minimal effect on several trace elements in donor breast milk but high levels of inter-donor variability of trace elements were observed. The observed decrease in the iron content of pasteurized donor milk is, however, unlikely to be clinically relevant.

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