Mineral Profile of Infant Formulae in the Las Vegas market: Compliance with label and regulations, contribution to dietary reference intakes and method comparison.

Desta Woldetsadik,D. Sims,Emmanuel Herrera Huerta,Timothy Nelson,Abigael Walker,Joshua Monk,M. Garner,Christopher Adcock,A. C. Hudson,D. E. Fleming

Published 2025 in Food and Chemical Toxicology

ABSTRACT

To date, there are few studies concerning determination of minerals in infant formulae intended to survey compliance of manufacturer claims and compliance with regulations. In this study, we collected infant formulae from the Las Vegas market to investigate the levels of Na, Mg, K, Mn, Fe, and Zn using inductively coupled plasma mass spectrometry (ICP-MS) following hot block-assisted digestion. Within analytical uncertainty, infant formula samples met label claims for Na, Mg, K, Fe, and Zn and were within the United States Food and Drug Administration (FDA) regulations. Estimated daily intakes (EDIs) of analyzed minerals from consumption of different types of infant formulae were: (158-316) mg d-1 for Na, (42.5-63.8) mg d-1 for Mg, (618-1025) mg d-1 for K, (0.006-0.345) mg d-1 for Mn, (4.79-16.6) mg d-1 for Fe and (4.11-8.88) mg d-1 for Zn. Except for Zn, the levels of other elements conform to currently recommended dietary reference values. In this study we also evaluated the accuracy of portable X-Ray Fluorescence (pXRF) for measuring Zn and Fe in infant formula. Bland-Altman analysis indicates that pXRF can be applied as a reliable technique for determination of Zn and Fe in infant formula.

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