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Effect of convection and microwave heating on the retention of bioactive components in human milk

Dorota Martysiak-Żurowska1, Edyta Malinowska-Pańczyk1, Małgorzata Orzołek1

  • 1Department of Chemistry, Technology and Biotechnology of Food, Chemical Faculty, Gdansk University of Technology, G. Narutowicza 11/12 Str., 80-233 Gdańsk, Poland.

Food Chemistry
|December 13, 2021
PubMed

Bioactive substances are very important components of human milk (HM), especially for premature newborns. The effects of convection (CH) and microwave heating (MWH) at 62.5 and 66 °C, on the level of selected bioactive components of HM: lysozyme (LZ), lactoferrin (LF), secretory immunoglobulin A (sIgA), basal lipase (BL), cytokine TGF-2, vitamin C and total antioxidant capacity (TAC) was compared. Regardless of the used heating methods the TAC of HM, determined by TEAC and ORAC-FL assay, proved to be insensitive to temperature pasteurization, in contrary to BL. MWH in the conditions of 62.5 for 5 min and 66 °C for 3 min are ensuring microbiological safety with a higher retention of most of the tested active HM proteins compared to CH. Only in the case of LZ the MWH had a more degradative effect on its concentration. Controlled conditions of MWH preserve the bioactive components of the HM better than CH.

Keywords:
Antioxidant capacityHuman milkLactoferrinLipaseLysozymeMicrowave heatingPasteurizationVitamin CsIgA

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