Peer-reviewed articles

Variation in macrominerals and trace elements in cows' retail milk and implications for consumer nutrition


Ásta Heiðrún E. Pétursdóttir

Project Manager

Authors: Eric E. Newton, Ásta H. Pétursdóttir, Stephane Beauclercq, James Clarke, Natasa Desnica, Sokratis Stergiadis

Version: Food Chemistry

Publication year: 2023


Based on previous farm-level studies, this study hypothesized that production system (conventional, CON; organic, ORG; channel island, CHA) and season would cause variation in the concentrations of macrominerals and trace elements in retail milk. On average, milk retained its status as an excellent source of Ca, P, I, and Mo across different demographics, and a very good source of K, Mg, and Zn for children. Compared with CON and ORG, CHA milk contained higher concentrations of Ca, Mg, P, Cu, Mn, and Zn; and lower concentrations of K and I. Macrominerals did not show a clear seasonal pattern but trace elements were all at lower concentrations during the typical grazing season. Variation in mineral concentrations can have implications to Ca and P supply in children, and I and Zn supply across different consumer demographics; while the seasonal variation was more pronounced than that associated with the production system.