Hair as a biomarker to evaluate the intake of iron, magnesium and zinc in children
Lipiec 25, 2018
Grudzień 17, 2018
Woźniak A., Wawrzyniak A., Jeznach-Steinhagen A.
Hair as a biomarker reflecting the intake of minerals could be helpful in correcting errors in the diet of children associated with inadequate consumption of magnesium, iron and zinc, and thus it can prevent their deficiency or excess in the body. The aim of the study was to evaluate the relationship between the intake of magnesium, iron and zinc and the concentration of these minerals in children’s hair. The study was conducted in Warsaw (Poland) among 148 children aged 7-9. Anthropometric measurements (height, body weight) were performed on the children and the BMI values were calculated. The dietary intake of magnesium, iron and zinc in the studied children was assessed by 3-day food records method. The children were divided into four groups based on quartiles of intake of individual minerals. The concentration of iron, zinc and magnesium in the children's hair was determined by atomic absorption spectrometry (AAS). The majority of the children had a normal height (91%), weight (93%) and adjusted BMI (74%). Relationships between the intake of magnesium (r=0.239, p=0.007), iron (r=0.247, p=0.004) and zinc (r=0.314, p <0.001) and the concentration of these minerals in hair of the children were observed. The average intake of particular minerals in all quartiles was significantly different (p<0.001). Statistically significant differences between the quartiles of intake of magnesium, iron and zinc and the concentration of these minerals in the hair of the children were also observed but in the case of magnesium and zinc, the higher quartile of minerals intake not always corresponded to the higher concentration in the hair of these minerals. The analysis of mineral concentration in hair may be used in the evaluation of the intake of minerals by children. The sensitivity of a biomarker such as the concentration of magnesium, iron and zinc in hair depending on the intake of such minerals is larger in the case of iron, and smaller in the case of magnesium and zinc.
Woźniak A., Wawrzyniak A., Jeznach-Steinhagen A. 2019. Hair as a biomarker to evaluate the intake of iron, magnesium and zinc in children. J. Elem., 24(2): 727-738. DOI: 10.5601/jelem.2018.23.4.1708
magnesium, iron, zinc, minerals intake, hair, biomarker, children