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Vitamin D Deficiency in Obese Children Is Associated with Some Metabolic Syndrome Components, but Not with Metabolic
Jagoda Hofman-Hutna1, Michał Hutny1, Edyta Matusik2
1Scientific Society of Medical Students, Faculty of Medical Sciences in Katowice, Medical University of Silesia, 40-055 Katowice, Poland.
Insights
Vitamin D deficiency in obese children is linked to metabolic syndrome components. Low vitamin D levels correlate with lower HDL and adiponectin, and higher waist-to-height ratio and triglycerides, suggesting a role in metabolic dysfunction.
Area of Science:
- Pediatrics
- Endocrinology
- Nutritional Science
Background:
- Vitamin D deficiency is a global concern in children, linked to skeletal issues, obesity, and metabolic syndrome.
- Emerging research suggests a connection between vitamin D status and metabolic health in pediatric populations.
Purpose of the Study:
- To evaluate vitamin D nutritional status in Polish children with obesity and varying degrees of metabolic syndrome.
- To analyze the correlation between vitamin D levels and specific metabolic syndrome components in this cohort.
Main Methods:
- An observational study involving 78 children (mean age 14.18 years) with obesity.
- Participants were categorized based on vitamin D status (deficiency vs. non-deficiency).
- Biochemical markers (HDL, adiponectin, triglycerides) and anthropometric measures (waist-to-height ratio) were assessed.
Main Results:
- Children with vitamin D deficiency exhibited significantly lower HDL and adiponectin levels.
- Conversely, vitamin D deficient children showed significantly higher waist-to-height ratio and triglyceride levels.
- No significant findings were observed in body composition analysis via bioelectrical impedance.
Conclusions:
- Vitamin D deficiency may adversely affect lipid and glucose metabolism in obese children, contributing to metabolic syndrome development.
- Waist-to-height ratio appears to be a sensitive indicator for abdominal obesity in relation to vitamin D status.
- Vitamin D deficiency might impact adipose tissue function, reducing adiponectin and potentially contributing to insulin resistance.
Abstract:
Vitamin D deficiency in children is a common nutritional issue in many populations worldwide, associated not only with skeletal malformations but, as recent studies suggest, also with the development of obesity and metabolic syndrome. The aim of this observational study was to assess the nutritional status of vitamin D in a group of Polish children with obesity and different grades of metabolic syndrome, with a consequent analysis of the correlation between vitamin D levels and the components of metabolic syndrome. For that purpose, the group of 78 participants (mean age: 14.18 ± 2.67 years) was recruited and further grouped in relation to vitamin D status into two groups of children with and without vitamin D deficiency. The biochemical parameters associated with obesity as well as anthropometric measures were assessed and analysed in search of significant differences between the groups. In the current group of children with obesity and vitamin D deficiency, HDL (45.00 ± 9.29) and adiponectin (7.21 ± 1.64) were found to be significantly lower than in their peers without vitamin D deficiency, whereas W/HtR (0.60 ± 0.04) and TG (171.31 ± 80.75) levels proved to be significantly higher. Body composition analysis using bioelectrical impedance returned no significant findings. The above findings suggest that vitamin D deficiency may influence lipid and glucose metabolism in children, leading to the development of abnormalities characteristic of the metabolic syndrome. A W/HtR parameter was shown to be a sensitive marker of abdominal obesity, which might provide an important means of assessing the correlation between vitamin D and this type of obesity. Independently, vitamin D deficiency may also influence the endocrinological function of adipose tissue, leading to lower concentrations of adiponectin. These in turn presented a linear correlation with the high results of the OGTT in the second hour of the test, hinting at its potential role in the pathophysiology of insulin resistance.
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