Effect of nutritional factors on urinary calcium excretion in a sample of Moroccan children and adolescents

Amina Bouziani,Mohamed Idrissi,Yasmine Guennoun,Hassan Aguenaou,Sara Ait Lachguer,Hasnae Benkirane,Naima Saeid,Habiba Bajit,Meryem Bouhamida,S Bourekkadi,K Slimani,A Soulaymani,H Hami,A Mokhtari

doi:10.1051/e3sconf/202131901039

Abstract

In addition to age, gender, body weight, hormonal status as well as certain physiological and pathological states, other factors exert considerable effects on calcium (Ca) retention and therefore on its urinary excretion. Among these other factors, many dietary nutrients have all been discussed as factors affecting urinary Ca through different studies. Thus, our study aims to evaluate the impact of various nutritional factors on urinary Ca excretion among a sample of Moroccan children and adolescents aged from 6 to 18 years old. A total of 133 Moroccan children and adolescents aged between 6 and 18 years were involved in this study. Participants were required from public and private schools in Rabat-Salé-Kenitra region. For each participant, anthropometry data, food record and 24-h urine samples were collected. Urinary Ca was estimated using ICP-mass spectrometry. The urinary Ca average was 73.58±37.13 mg/day. Urinary Ca excretion had no significant association (p>0.05) with different studied nutrients (r=-0.082, r=0.118, r=-0.025, r=0.142, r=0.084, r=0.119 for Ca, proteins, vitamin D, sodium, phosphorus and magnesium intakes respectively).The current impact evaluation of various nutritional factors on urinary Ca excretion suggests that Ca requirement may be not influenced by nutrients intake but it is highly recommended for researchers to carry out more studies and define all factors that cause Ca deficiency in Moroccan children and adolescents.

Highlights

Childhood and adolescence present the important periods of the bone growth that are conditioned by an adequate intake of Calcium (Ca)
Its bioavailability, reflecting its urinary excretion, is largely influenced by different factors [1, 2, 3]. It can vary depending on several parameters such as sun exposure, that depend on age changes, transient conditions such as pregnancy and lactation, nutritional and hormonal status, medical conditions [2, 4], geographical location, physical activity, environmental conditions [5], probably some genetic and physiological factors and dietary habits
The current study was conducted to evaluate the interrelation between some nutritional elements considered as one of the major important factors which present a considerable impact on urinary Ca excretion

Summary

Introduction

Childhood and adolescence present the important periods of the bone growth that are conditioned by an adequate intake of Calcium (Ca) This nutritional element is considered as the most important nutrient that plays essential roles in the human health. Its bioavailability, reflecting its urinary excretion, is largely influenced by different factors [1, 2, 3] It can vary depending on several parameters such as sun exposure, that depend on age changes (growth, senescence), transient conditions such as pregnancy and lactation, nutritional and hormonal status, medical conditions [2, 4], geographical location, physical activity, environmental conditions [5], probably some genetic and physiological factors and dietary habits. The relation of nutrition to the Ca urine liberation affects the overall state of Ca balance acting on its retention and its losses [6]

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