Hostname: page-component-77f85d65b8-2tv5m Total loading time: 0 Render date: 2026-04-19T20:45:56.177Z Has data issue: false hasContentIssue false

Organic anions and potassium salts in nutrition and metabolism

Published online by Cambridge University Press:  14 December 2007

Christian Demigné*
Affiliation:
Unité Maladies Métaboliques et Micronutriments, INRA de Clermont-Ferrand-Theix, CRNH d'Auvergne, 63122 St-Genés-Champanelle, France
Houda Sabboh
Affiliation:
Unité Maladies Métaboliques et Micronutriments, INRA de Clermont-Ferrand-Theix, CRNH d'Auvergne, 63122 St-Genés-Champanelle, France
Caroline Puel
Affiliation:
Unité Maladies Métaboliques et Micronutriments, INRA de Clermont-Ferrand-Theix, CRNH d'Auvergne, 63122 St-Genés-Champanelle, France
Christian Rémésy
Affiliation:
Unité Maladies Métaboliques et Micronutriments, INRA de Clermont-Ferrand-Theix, CRNH d'Auvergne, 63122 St-Genés-Champanelle, France
Véronique Coxam
Affiliation:
Unité Maladies Métaboliques et Micronutriments, INRA de Clermont-Ferrand-Theix, CRNH d'Auvergne, 63122 St-Genés-Champanelle, France
*
*Corresponding author: Dr Christian Demigné, fax +33 473 62 46 38, email demigne@clermont.inra.fr
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the 'Save PDF' action button.

The present review examines the importance of dietary organic anions in preventive nutrition. Organic anions are chiefly supplied by plant foods, as partially neutralised K salts such as potassium citrate, potassium malate and, to a lesser extent, oxalate or tartrate salts. Animal products may also supply K anions, essentially as phosphate, but also as lactate as a result of fermentative or maturation processes, but these K salts have little alkalinising significance. Citrate and malate anions are absorbed in the upper digestive tract, while a substantial proportion is probably metabolised in the splanchnic area. Whatever their site of metabolism, these anions finally yield KHCO3 which is used by the kidneys to neutralise fixed acidity. This acidity essentially reflects the oxidation of excess S amino acids to sulfate ions, which is mainly related to the dietary protein level. Failure to neutralise acidity leads to low-grade metabolic acidosis, with possible long-term deleterious effects on bone Ca status and on protein status. Furthermore, low-grade acidosis is liable to affect other metabolic processes, such as peroxidation of biological structures. These metabolic disturbances could be connected with the relatively high incidence of osteoporosis and muscle-protein wasting problems observed in ageing individuals in Europe and Northern America. Providing a sufficient supply of K organic anions through fruit and vegetable intake should be recommended, fostering the actual motivational campaigns ('five (or ten) per d') already launched to promote the intake of plant foods rich in complex carbohydrates and various micronutrients.

Information

Type
Research Article
Copyright
Copyright © The Authors 2004