In vitro dialyzability of zinc from different salts used in the supplementation of infant formulas
- 79 Downloads
Seven zinc salts—acetate, chloride, lactate, sulfate, citrate, gluconate, and oxide—were added to milk—and soy-based infant formulas to estimate possible differences in zinc availability depending on the type of salt used. For this purpose, an in vitro method that estimates the dialyzability of the element (i.e., the fraction available for absorption) was applied. Zinc dialyzability is always higher in milk-based products than in soy products, even when the total zinc contents are higher in the latter.
The salts can be classified according to the zinc dialyzability in the two types of formulas as follows: oxide>gluconate=chloride=lactate>citrate=acetate>sulfate. Therefore, according to the dialysis percentage, oxide and gluconate are the compounds of choice for zinc supplementation of infant formulas.
Index EntriesDialyzability infant formulas supplementation zinc
Unable to display preview. Download preview PDF.
- 5.National Research Council (NRC), Recommended Dietary Allowances, 10th ed., National Academy of Sciences, Washington, DC (1989).Google Scholar
- 14.EEC: Commission Directive 91/321/EEC of 14 May 1991 on infant formulae and follow-on formulae. No. L175, 4/7/1991, pp. 35–49.Google Scholar
- 17.B. Lönnerdal, Nutritional aspects of soy formula, Acta Paediatr. 83(Suppl. 402), 105–108 (1994).Google Scholar
- 19.A. A. Minihane, T. E. Fox, and S. J. Fairweather-Tait, A continuous flow in vitro method to predict bioavailability of Fe from foods, in Bioavailability ’93. Nutritional, Chemical and Food Processing Implications Nutrient Availability, Proceedings, U. Schlemmer, ed., Bundesforschungs anstalt für Ernährung, Ettlingen, Germany, Pt. 2, pp. 175–179 (1993).Google Scholar
- 25.L. X. Rojas, L. R. McDowell, R. J. Cousins, F. G. Martin, N. S. Wilkinson, A. B. Johnson, et al., Interaction of different organic and inorganic zinc and copper sources fed to rats, J. Trace Element Med. Biol. 10, 139–144 (1996).Google Scholar
- 26.K. J. Wedekind and D. H. Baker, Zinc bioavailability in feed-grade zinc sources, J. Anim. Sci. 67(Suppl. 2), 126–132 (1989).Google Scholar