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Evaluation of trace elements released by edible clays in physicochemically simulated physiological media
J R Odilon Kikouama1, F Le Cornec, S Bouttier
1Université Paris-Sud, EA 401, Châtenay-Malabry, France. richard.kikouama@u-psud.fr
International Journal of Food Sciences and Nutrition
|July 9, 2008
Summary
Edible clays ingested by pregnant women release trace elements differently based on pH. Lower pH (stomach) releases more copper, iron (Fe(III)), and zinc, while heating may aid decontamination.
Area of Science:
- Geochemistry
- Environmental Science
- Human Nutrition
Background:
- Edible clays are consumed by pregnant women in West Africa.
- Understanding trace element release is crucial for assessing health impacts.
Purpose of the Study:
- To simulate and quantify trace element release from edible clays in physiological media.
- To evaluate potential beneficial and hazardous health effects of ingested clays.
Main Methods:
- Physicochemical simulation of oral, stomach, and intestinal media.
- Inductively coupled plasma emission spectrometry and spectrophotometry for trace element analysis.
- Microbiological analysis and comparison with European Pharmacopoeia standards.
Main Results:
- Trace element release was pH-dependent; lower pH increased copper, Fe(III), and zinc release.
- Iron (Fe(II)) levels were consistent across stomach and intestinal pH.
- Manganese, nickel, and lead were below quantification limits; heating increased element release.
Conclusions:
- The study quantifies pH-dependent trace element release from edible clays.
- Results provide insights into potential nutritional benefits and toxicological risks.
- Microbiological safety was confirmed, but trace element bioavailability requires further investigation.
