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The impact of fluoridated milks on the availability of trace elements in milk

Lookup NU author(s): Dr Vida Zohoori, Emeritus Professor Chris Seal, Professor Paula Moynihan, Dr Nick Steen, Emerita Professor Anne Maguire

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Abstract

BACKGROUND: Milk is a nutritious food and also used as a vehicle for fluoride (F) administration. However, the impact of added F on milk's nutritional profile Is unknown. In vitro simulated gastrointestinal digestion with enzymatic steps was used to measure and compare the availability of trace elements (Fe, Zn, Cu, Cr, Mo and Se) in pasteurised skimmed (0.3% fat) and whole (4% fat) milk samples with four concentrations of F (0, 2.5, 3.75 and 5.0 ppm) as well as in non-F and F ultrahigh-temperature (UHT)-processed 4% fat milks. Post-centrifugation supernatant trace element concentrations were measured after each stage of digestion by inductively coupled plasma mass spectroscopy. RESULTS: F showed a negative effect on Cu availability in cow's milk. Fat removal increased the availabilities of Cu, Zn, Cr and Se but decreased the Mo availability. There was a greater Cr availability in the UHT milk sample compared with pasteurised samples. CONCLUSION: These initial data suggest that adding F to milk does not have a marked effect on its trace element profile, with the exception of reduced Cu availability. However, these findings would benefit from further studies both in vitro and in vivo. (C) 2009 Society of Chemical Industry


Publication metadata

Author(s): Zohoori V, Seal CJ, Moynihan PJ, Steen IN, Maguire A

Publication type: Article

Publication status: Published

Journal: Journal of the Science of Food and Agriculture

Year: 2009

Volume: 89

Issue: 4

Pages: 595-602

Date deposited: 25/01/2010

ISSN (print): 0022-5142

ISSN (electronic): 1097-0010

Publisher: John Wiley & Sons Ltd.

URL: http://dx.doi.org/10.1002/jsfa.3481

DOI: 10.1002/jsfa.3481


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