title: Effect of citric acid supplements to a maize-soya diet on the in vitro availability of minerals, trace elements, and heavy metals.
abstract: The aim of the present study was to evaluate the effect of increasing supplements of citric acid (CTA) on the in vitro availability of mineral (Ca, Mg), trace elements (Mn, Zn) and heavy metals (Pb, Cd). Phytaterich diets (0.8%) based on maize, soybean meal, corn starch and soybean oil (containing 5.0 g Ca, 1.2 g Mg, 50 mg Mn, 22 mg Zn, 10 mg Pb and 5 mg Cd per kg diet) were supplemented with 0, 1, 2, 3 and 4% of CTA. All diets were treated in a multi-enzyme in vitro system followed by equilibrium dialysis after peptic and pancreatic digestion. Under the conditions investigated, dietary addition of CTA enhanced dialysability of calcium, magnesium, manganese and zinc. Furthermore, a dose-dependent increase of lead and cadmium dialysability due to CTA supplementations was evident.
authors.affiliation: Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-University, Giessen, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Walter
authors.forename: G
authors.initials: G
authors.lastname: Rimbach
authors.forename: E
authors.initials: E
authors.lastname: Most
authors.forename: J
authors.initials: J
authors.lastname: Pallauf
mesh_terms: D000821:Animal Feed; D000818:Animals; D001682:Biological Availability; D019343:Citric Acid / Q000008:administration & dosage / Q000627:therapeutic use*; D019587:Dietary Supplements; D004063:Digestion; D019216:Metals, Heavy / Q000378:metabolism*; D008903:Minerals / Q000378:metabolism*; D013025:Glycine max; D014131:Trace Elements / Q000378:metabolism*; D003313:Zea mays
chemical_list: D019216:Metals, Heavy; D008903:Minerals; D014131:Trace Elements; D019343:Citric Acid