Background: The association between vitamin D status and inflammatory biomarkers and lipid profile is not well known, especially in adolescents. Therefore, the aim of the current study is to investigate the association of vitamin D status with serum lipids and inflammatory biomarkers, including IL-10, IL-6, hsCRP, and TNFR-2, in male adolescents. Methods and materials: A sample of seventy-one high school male students, aged 17 years old, from a high school in Tehran were enrolled in the study. They were divided into four groups including group with serum vitamin D below 25 (ng/mL) (SVD < 25; n = 36), 25 and above (ng/mL) (SVD ≥ 25; n = 35), negative-hsCRP (n = 48), and positive-hsCRP (n = 23). Weight, height, body mass index, dietary intake, serum lipids, and inflammatory biomarkers, including IL-10, IL-6, hsCRP, and TNFR-2, were measured. Results: In the (SVD < 25) group, the serum level of TNFR-2 was significantly higher compared to that in the (SVD ≥ 25) group. There was a significant negative association between serum TNFR-2 and vitamin D levels in the whole sample. We found significant lower levels of IL-10 in positive-hsCRP group compared to the negative-hsCRP group. In addition, there was a significant negative correlation between the serum vitamin D level and hsCRP in both hsCRP groups. The HDL level was lower in the (SVD < 25) group compared to that in the (SVD ≥ 25) group. Finally, there was a negative correlation between the serum HDL and hsCRP levels in the positive-hsCRP subjects. Conclusion: Based on the findings it can be concluded that serum vitamin D affects HDL and inflammation status. Although serum levels of HDL and inflammation status are both predictors of metabolic syndrome and cardiovascular disease, further studies are needed to prove it, especially in adolescents.

Background: Deficiency of vitamin D, an anti-inflammatory micronutrient with some favorable effects on lipid profiles, has been found to be highly prevalent in adolescents. We aimed to investigate the effect of a school-based vitamin D supplementation regimen on the correction of vitamin D deficiency as well as lipid and inflammatory profiles of healthy adolescent boys. Methods: In this randomized single-blind placebo-controlled trial, seventy-one healthy adolescent boys (age 17 years old) were recruited from one high school in Tehran, Iran, and randomly assigned to two groups. The supplement group received vitamin D pearls at a dose of 50,000 IU monthly for 6 months, this dose is indeed defined by the Ministry of Health in Iran for a potential national school-based vitamin D supplementation program. The other group was given placebo pearls for the same duration. Before and after the treatment, the serum levels of 25-hydroxy vitamin D (25(OH) D), parathyroid hormone (PTH), retinol, lead (Pb), the lipid profile and the inflammatory biomarkers were measured and compared. Results: Between-groups statistical analysis showed that a dose (50,000 IU/month) vitamin D significantly increased the serum levels of 25-hydroxyvitamin D (25 (OH) D) (p < 0.001) and decreased serum levels of PTH (p = 0.003). No significant change was observed in serum levels of retinol and Pb. Between-group analysis revealed that the serum levels of TG (P = 0.001) decreased while an increase in serum levels of HDL (p = 0.021) was observed (p < 0.05). Both the within- and between-group analysis showed that serum tumor necrosis factor receptor 2 (TNFR2) concentration declined while serum interleukin-10 (IL-10) increased in response to vitamin D supplementation (p < 0.05). Conclusion: A supplementation regimen of (50,000 IU/month) vitamin D in a context with high rates of vitamin deficiency has shown positive impacts on the serum vitamin D, lipid profile and inflammatory biomarkers in healthy adolescent boys.

Background: Middle childhood and adolescence are critical times for the growth, development, and establishment of healthy eating habits. The Europe and Central Asia (ECA) region has been through economic and nutrition transitions over the past 20 years, which are likely to have affected the nutritional status of this group. Objective: This review aimed to collate data on the nutritional status and dietary patterns of school-aged children (SAC) and adolescents (5-19 years) across the ECA region in order to inform policy and programming decisions. Methods: A systematic search of the literature in Pubmed, Cochrane, and ScienceDirect databases was conducted (April 2019), complemented by a systematic review of nationally representative surveys. Inclusion criteria were any data on micronutrient deficiencies, overweight, stunting, wasting, thinness, or dietary patterns in SAC and adolescents in the 21 UNICEF-defined countries of ECA, published since the year 2000. Results: Results included 134 published papers and 6 sources of survey data. The majority of studies were conducted in Turkey (56%), with all other countries having fewer than 10 studies each; 8 countries in the region having no studies on this age group at all. The most significant nutrition issue was overweight and obesity. Micronutrient deficiencies, particularly anemia, emerge as a further challenge. Dietary patterns were worse in urban areas and boys. Conclusions: The findings of this review suggest that there are 3 critical areas that need immediate attention: the promotion of healthy diets and physical activity to address high levels of overweight/obesity, anemia prevention efforts, and addressing the considerable data gaps for SAC and adolescent nutrition.

The Eastern Mediterranean Regions and Europe and Central Asia Regions are facing an epidemiological and nutrition transition, especially among vulnerable groups including mothers, children and adolescents. This has led to a double burden of malnutrition (DBM). Poor infant and young child feeding (IYCF), poor dietary diversity, excessive consumption of energy dense unhealthy foods, a growing obesogenic environment for children, including aggressive marketing of unhealthy foods for children, and reduced physical activity are among the main causes. In addition, several countries in the region lack the nutrition governance capacity to respond effectively to the DBM. This article reviews the context and provides a set of conclusions in which countries are called to reduce the marketing of unhealthy foods for children, enforce the fortification of staple foods with micronutrients to reduce micronutrient deficiencies and improve IYCF, including breastfeeding in the region. Also, the call is strong for cross-border multi-sectoral efforts to address the DBM in these regions.

Background/Objectives: Vitamin D—crucial for bone health, immune function, and hormone regulation—is deficient worldwide, affecting around half the population, particularly women. The study aims to determine the prevalence and risk factors of vitamin D deficiency and hypovitaminosis D in non-pregnant women in Lebanon. Methods: A national cross-sectional survey sampled households across Lebanon, covering 2803 non-pregnant women aged 15 to 49. Demographic information and dietary habits were collected, and anthropometric measurements and serum analyses, including 25-hydroxyvitamin D (25(OH)D) concentrations, were conducted. Multivariable Poisson regressions were constructed to calculate the adjusted prevalence ratio (aPR) for vitamin D deficiency and hypovitaminosis D of variables. Results: The prevalence of vitamin D deficiency (<30 nmol/L) among non-pregnant women in Lebanon was 37.9%, while 69.2% had hypovitaminosis D (<50 nmol/L). Wearing a veil (hijab) was identified as the most significant risk factor for both vitamin D deficiency (aPR = 3.76) and hypovitaminosis D (aPR = 1.47). Additionally, olive skin and dark skin were both associated with an increased prevalence of vitamin D deficiency (olive skin: aPR = 1.14; dark skin: aPR = 1.28), while only dark skin color was associated with hypovitaminosis D (aPR = 1.10). In contrast, protective factors against vitamin D deficiency and hypovitaminosis D included daily sun exposure exceeding one hour (aPR = 0.83–0.91) and vitamin D supplementation (aPR = 0.30–0.55). Anemia, folate deficiency, and vitamin B12 deficiency were significantly associated with a higher prevalence of vitamin D deficiency, hypovitaminosis D, or both. BMI was not significantly associated with vitamin D deficiency; however, women with underweight (aPR = 1.13) and obesity (aPR = 1.12) exhibited a higher prevalence of hypovitaminosis D. Conclusions: Vitamin D deficiency and hypovitaminosis D affect a significant portion of non-pregnant women in Lebanon, with veiling (hijab wearing), limited sun exposure, and lack of supplementation as primary risk factors. Future work should focus on tailoring recommendations for vitamin D supplementation, sun exposure, and food fortification to effectively address the diverse risk factors in the population.