Dietary citric acid enhances absorption of aluminum in antacids. 1986

P Slanina, and W Frech, and L G Ekström, and L Lööf, and S Slorach, and A Cedergren

Ten healthy men ingested, twice daily between meals, during each of the seven-day experimental periods: (a) citric acid (as lemon juice), (b) Al(OH)3, or (c) Al(OH)3 + citric acid. Whole blood sampled after each dietary period was analyzed electrothermally after digestion with nitric acid. Moderate, but significant, increases in mean Al concentrations as compared with pretreatment values [5 (SD 3) micrograms of Al per liter] were seen after ingestion of either citric acid or Al(OH)3: 9 (SD 4) and 12 (SD 3) micrograms/L, respectively. Ingestion of both Al(OH)3 and citric acid resulted in a more pronounced, highly significant (p less than 0.001) increase in Al concentrations, to 23 (SD 2) micrograms Al/L, probably owing to formation and absorption of Al-citrate complexes.

UI MeSH Term Description Entries
D007408 Intestinal Absorption Uptake of substances through the lining of the INTESTINES. Absorption, Intestinal
D008297 Male Males
D002951 Citrates Derivatives of CITRIC ACID.
D004032 Diet Regular course of eating and drinking adopted by a person or animal. Diets
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D006863 Hydrogen-Ion Concentration The normality of a solution with respect to HYDROGEN ions; H+. It is related to acidity measurements in most cases by pH pH,Concentration, Hydrogen-Ion,Concentrations, Hydrogen-Ion,Hydrogen Ion Concentration,Hydrogen-Ion Concentrations
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D000535 Aluminum A metallic element that has the atomic number 13, atomic symbol Al, and atomic weight 26.98. Aluminium,Aluminium-27,Aluminum-27,Aluminium 27,Aluminum 27
D000863 Antacids Substances that counteract or neutralize acidity of the GASTROINTESTINAL TRACT. Alkalinizing Agent,Antacid,Alkalinizing Agents,Agent, Alkalinizing,Agents, Alkalinizing
D019343 Citric Acid A key intermediate in metabolism. It is an acid compound found in citrus fruits. The salts of citric acid (citrates) can be used as anticoagulants due to their calcium chelating ability. Citrate,Anhydrous Citric Acid,Citric Acid Monohydrate,Citric Acid, Anhydrous,Uralyt U

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