scholarly journals Mechanisms Involved in the Relationship between Vitamin D and Insulin Resistance: Impact on Clinical Practice

Nutrients ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 3491
Author(s):  
Victoria Contreras-Bolívar ◽  
Beatriz García-Fontana ◽  
Cristina García-Fontana ◽  
Manuel Muñoz-Torres
Keyword(s):  
Insulin Resistance ◽  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Randomized Clinical Trials ◽  
Polycystic Ovary ◽  
Basic Research ◽  
Hydroxyvitamin D ◽  
The Status ◽  
Skeletal Activity ◽  
The Relationship

Recent evidence has revealed anti-inflammatory properties of vitamin D as well as extra-skeletal activity. In this context, vitamin D seems to be involved in infections, autoimmune diseases, cardiometabolic diseases, and cancer development. In recent years, the relationship between vitamin D and insulin resistance has been a topic of growing interest. Low 25-hydroxyvitamin D (25(OH)D) levels appear to be associated with most of the insulin resistance disorders described to date. In fact, vitamin D deficiency may be one of the factors accelerating the development of insulin resistance. Vitamin D deficiency is a common problem in the population and may be associated with the pathogenesis of diseases related to insulin resistance, such as obesity, diabetes, metabolic syndrome (MS) and polycystic ovary syndrome (PCOS). An important question is the identification of 25(OH)D levels capable of generating an effect on insulin resistance, glucose metabolism and to decrease the risk of developing insulin resistance related disorders. The benefits of 25(OH)D supplementation/repletion on bone health are well known, and although there is a biological plausibility linking the status of vitamin D and insulin resistance supported by basic and clinical research findings, well-designed randomized clinical trials as well as basic research are necessary to know the molecular pathways involved in this association.

scholarly journals Relationship Between Vitamin D Deficiency And Insulin Resistance In Obese Children

2020 ◽  
Vol 13 (1) ◽  
pp. 82
Author(s):  
Aidah Juliaty ◽  
Putri Lestari Gabrilasari ◽  
Dasril Daud ◽  
Johan Setyawan Lisal
Keyword(s):  
Insulin Resistance ◽  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Cross Sectional Study ◽  
Bivariate Analysis ◽  
Obese Children ◽  
Cross Sectional ◽  
Hydroxyvitamin D ◽  
25 Hydroxyvitamin D ◽  
Deficiency Group

INTRODUCTION: Obesity represents the major risk factor for development of insulin resistance during childhood and adolescents. In obesity, adipose tissue release free fatty acids, various hormones, and cytokines, resulting in insulin resistance. This study aimed to establish the correlation between vitamin D deficiency and the incidence of insulin resistance in obese children. DESIGN AND METHOD: This analytical cross-sectional study was arranged from December 2019 - February 2020 included 96 students aged 11 - 17 years old from junior and senior high school who met the criteria for obesity in Makassar. The study subjects were parted into two groups, obese children with vitamin D deficiency (levels of 25-hydroxyvitamin D ≤ 20 ng/ml) and obese children without vitamin D deficiency group (levels of 25-hydroxyvitamin D > 20 ng/ml). Data were analyzed using univariate and bivariate analysis. RESULTS: The frequency of insulin resistance in obese children with vitamin D deficiency was 28 (54.9%), while obese children without vitamin D deficiency was 10 (22.2%). Based on statistical analysis, the frequency of the occurrence of insulin resistance in vitamin D deficiency obese children was higher than in obese children without vitamin D deficiency with OR = 4.261 (95% CI 1.744 – 10.411), p = 0.001. CONCLUSION: The risk of insulin resistance in obese children with vitamin D deficiency is 4.261 times higher than obese children without vitamin D deficiency.

scholarly journals The Relationship between Vitamin D Metabolites and Androgens in Women with Polycystic Ovary Syndrome

Nutrients ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1219
Author(s):  
Jakub Mesinovic ◽  
Helena J. Teede ◽  
Soulmaz Shorakae ◽  
Gavin W. Lambert ◽  
Elisabeth A. Lambert ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Vitamin D ◽  
Polycystic Ovary ◽  
Total Testosterone ◽  
Body Fat Percentage ◽  
Vitamin D Metabolites ◽  
Fat Percentage ◽  
Ovary Syndrome ◽  
Hs Crp ◽  
The Relationship

Polycystic ovary syndrome (PCOS) is the most common endocrine disorder among women of reproductive age, with hyperandrogenism present in up to 90% of affected women. Some evidence suggests a link between vitamin D deficiency and PCOS features via insulin resistance and inflammation. Our aim was to explore the relationship between biochemical markers of vitamin D status and androgens in women with PCOS. This cross-sectional study used bio-banked samples from 46 pre-menopausal women with PCOS (mean ± SD: age 30 ± 6 years; BMI 29 ± 6 kg/m2). We measured 25-hydroxyvitamin D (25[OH]D), vitamin D-binding protein (DBP), total testosterone, sex hormone-binding globulin (SHBG), and calculated the free androgen index (FAI) and bioavailable and free 25(OH)D. Fasting glucose and insulin were used to calculate the homeostatic model assessment of insulin resistance (HOMA-IR) and body fat percentage was determined via dual energy x-ray absorptiometry. High-sensitivity C-reactive protein (hs-CRP) was measured as a marker of inflammation. DBP was positively associated with total 25(OH)D and expectedly, negatively associated with free 25(OH)D. There were no associations between vitamin D metabolites and total testosterone, SHBG or FAI, even after adjusting for age, body fat percentage, HOMA-IR and hs-CRP. We found no associations between vitamin D metabolites and androgens in women with PCOS. Studies that have identified a vitamin D–androgen link have largely relied on methodology with numerous pitfalls; future studies should exclusively use gold-standard measures to confirm these findings in this population.

scholarly journals Very high rates of vitamin D insufficiency in women of child-bearing age living in Beijing and Hong Kong

2008 ◽  
Vol 99 (6) ◽  
pp. 1330-1334 ◽  
Author(s):  
Jean Woo ◽  
Christopher W. K. Lam ◽  
Jason Leung ◽  
Winny Y. Lau ◽  
Edith Lau ◽  
...  
Keyword(s):  
Vitamin D ◽  
Hong Kong ◽  
Pregnant Women ◽  
Vitamin D Deficiency ◽  
Vitamin D Insufficiency ◽  
Dietary Intakes ◽  
Hydroxyvitamin D ◽  
The North ◽  
25 Hydroxyvitamin D ◽  
The Relationship

We aimed to describe the vitamin D status of young women living in two Chinese cities in the spring – Beijing in the north (latitude 39° north) and Hong Kong (latitude 22° north) in the south. We also examined the relationship between serum 25-hydroxyvitamin D and parathyroid hormone (PTH) concentrations to determine a threshold for serum 25-hydroxyvitamin D above which there is no further suppression of PTH. Finally, we examined whether dietary Ca intake influences this relationship. Non-pregnant women aged 18–40 years (n 441) were recruited between February and June. Fasting blood was collected and dietary intakes were assessed using 5 d food records. Mean serum 25-hydroxyvitamin D concentration was lower in Beijing than Hong Kong women (29 v. 34 nmol/l; P < 0·001). Vitamin D deficiency ( ≤  25 nmol/l) was indicated in 40 % of Beijing and 18 % of Hong Kong women, and over 90 % of women in both cities were insufficient ( ≤ 50 nmol/l). Mean Ca and vitamin D intakes were 478 mg/d and 2·0 μg/d, respectively. The relationship between 25-hydroxyvitamin D concentration and PTH was linear throughout the range with a slope of − 0·36 (different from 0; P < 0·001; R 0·26), with no apparent threshold. There was no influence of Ca intake on the relationship between 25-hydroxyvitamin D and PTH concentration. Vitamin D deficiency is common and insufficiency is very common in non-pregnant women in Hong Kong and Beijing during spring. Serum 25-hydroxyvitamin D was inversely associated with PTH with no apparent threshold. Strategies such as vitamin D fortification or supplementation may be required.

Association between Vitamin D Level and Acne, and Correlation with Disease Severity: A Meta-Analysis

Dermatology ◽  
2021 ◽  
pp. 1-8
Author(s):  
Yusuf Hasamoh ◽  
Kunlawat Thadanipon ◽  
Premjit Juntongjin
Keyword(s):  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Meta Analysis ◽  
Inverse Association ◽  
Hydroxyvitamin D ◽  
Vitamin D Levels ◽  
Newcastle Ottawa Scale ◽  
25 Hydroxyvitamin D ◽  
The Relationship ◽  
Ottawa Scale

<b><i>Background:</i></b> Vitamin D deficiency is frequently associated with several medical conditions. However, a comprehensive meta-analysis assessing the association between vitamin D level and acne is lacking. <b><i>Objective:</i></b> To determine the relationship between vitamin D level and acne, and to assess the association between vitamin D level and acne severity. <b><i>Methods:</i></b> This meta-analysis was assessed by using the PubMed, EMBASE, Cochrane, and Scopus databases following the PRISMA guidelines. Serum/plasma 25-hydroxyvitamin D (25[OH]D) level, vitamin D deficiency, and the severity association between acne patients and healthy controls (HCs) were evaluated. The quality assessment was performed by using the Newcastle-Ottawa Scale. <b><i>Results:</i></b> Thirteen articles with a total of 1,362 acne patients and 1,081 HCs were included. The circulating 25(OH)D levels were significantly lower in patients with acne than in HCs (pooled MD = –9.02 ng/mL, 95% CI = –13.22 to –4.81, <i>p</i> &#x3c; 0.0001). Vitamin D deficiency was more prevalent in acne patients than in HCs (pooled OR = 2.97, 95% CI = 1.68–5.23, <i>I</i><sup>2</sup> = 72%). Also, vitamin D levels were negatively correlated with acne severity. <b><i>Conclusion:</i></b> This meta-analysis demonstrated the significantly low vitamin D levels in acne patients. Also, there was evidence of an inverse association between vitamin D levels and acne severity. Therefore, vitamin D might be involved in the pathogenesis of acne.

Vitamin D Status and Its Determinants in Healthy Slovenian Pregnant Women

2015 ◽  
Vol 67 (2) ◽  
pp. 96-103 ◽  
Author(s):  
Aneta Soltirovska Salamon ◽  
Evgen Benedik ◽  
Borut Bratanič ◽  
Manca Velkavrh ◽  
Irena Rogelj ◽  
...  
Keyword(s):  
Vitamin D ◽  
Pregnant Women ◽  
Vitamin D Deficiency ◽  
Sun Exposure ◽  
Physical Activities ◽  
Dietary Intakes ◽  
Hydroxyvitamin D ◽  
Day Range ◽  
The Status ◽  
25 Hydroxyvitamin D

Background/Aims: Vitamin D deficiency is a common underdiagnosed condition. The aim of this was to analyze the status of vitamin D and its determinants in healthy Slovenian pregnant women. Methods: A total of 132 volunteer pregnant women completed a questionnaire including baseline demographics, food frequency, physical activities; anthropometrical measurements, body mass index and levels of 25-(OH)D in serum were performed during the third trimester, and dietary intakes were assessed during the 27-28th week of gestation. Results: Vitamin D deficiency was present in 14% while insufficiency was present in 41% of women. The risk for inadequacy was higher in women older than 30 years (p = 0.01), in those with less frequent outdoor physical activity (p = 0.01) and in pregnancies during the low sun exposure season (p = 0.04). Insufficiency was not significantly more frequent in less educated women, unemployed and in those living in urban area. The median value of vitamin D from habitual dietary intake was 1.5 µg/day (range 0.1-13.4) and did not influence 25-hydroxyvitamin D level (p = 0.91). Conclusions: The prevalence of vitamin D inadequacy was 55% and was dependent on age, season and outdoor physical activities. The results suggest a discrepancy between vitamin D intake through habitual diet and the reference needs.

Vitamin D supply of patients with hip fracture

2014 ◽  
Vol 155 (17) ◽  
pp. 659-668 ◽  
Author(s):  
Antal Salamon ◽  
Balázs Hepp ◽  
Ákos Mátrai ◽  
Csaba Biró ◽  
Katalin Ágota ◽  
...  
Keyword(s):  
Vitamin D ◽  
Hip Fracture ◽  
Vitamin D Deficiency ◽  
Hip Fractures ◽  
Hydroxyvitamin D ◽  
Control Subjects ◽  
25 Hydroxyvitamin D ◽  
Few Data ◽  
Prevention And Cure ◽  
The Relationship

Introduction: Vitamin D deficiency is an important risk factor for fractures. However, there are few data available only on the relationship between serum 25-hydroxyvitamin D levels and recovery after surgery for hip fracture. Aim: The authors investigate the vitamin D supply of patients with hip fractures. Method: Between February and September 2013, serum 25-hydroxyvitamin D and parathyroid hormone levels were determined in 203 patients with hip fracture (74.8±11.5 ys; 67 men and 136 women) and in 74 control subjects. Results: Vitamin D deficiency and secondary hyperparathyroidism occurred significantly more frequently in patients with hip fracture than in control subjects (72% vs. 45%, and 33% vs. 17%, respectively). Patients with better condition after surgery showed higher 25-hydroxyvitamin D levels (p<0.001) than those with poor condition. Serum 25-hydroxyvitamin D were lower in the 31 patients who died [median of survival time: 19 (5–52) days] compared to those who survived [22.6 (9.5–45.0) vs. 33.0 (16.5–56.6) nmol/l]. Conclusions: The association between vitamin-D deficiency and mortality as well as the positive correlation between serum 25-hydroxyvitamin D levels and better postoperative condition confirm the importance of proper vitamin D supply in the prevention and cure of hip fractures, what is more in the increase of the chance of survival. Orv. Hetil., 2014, 155(17), 659–668.

scholarly journals Study of serum calcium and vitamin D levels with hormonal profile along with biochemical profile in women with polycystic ovary syndrome

2017 ◽  
Vol 6 (9) ◽  
pp. 4075
Author(s):  
Ilangovan Subashree ◽  
Umakant Ramchandra Valvekar ◽  
Geetha Prasad
Keyword(s):  
Insulin Resistance ◽  
Vitamin D ◽  
Polycystic Ovary Syndrome ◽  
Vitamin D Deficiency ◽  
Serum Calcium ◽  
Polycystic Ovary ◽  
Ovary Syndrome ◽  
Control Female ◽  
Hormonal Profile ◽  
Vitamin D Levels

Background: The polycystic ovary syndrome (PCOS) is one of the commonest human endocrinopathies and is increasingly recognized as a variant of the metabolic syndrome in women with the characteristic features of insulin resistance, central obesity, impaired glucose metabolism, dyslipidemia, and hypertension.Methods: This study is mainly focused on study of parameters like gonadotropin hormonal profile, serum vitamin D and calcium levels in polycystic ovary disease (PCOD). The study comprised 45 clinically proven polycystic ovary disease patients in the age range of 19-34 years. The biochemical estimations carried out in the study were – Fasting Blood sugar, LH, FSH, prolactin, 25- OH vitamin D and calcium along with anthropometric data. The values obtained were compared with age matched equal number of healthy control female subjects from the same population.Results: The serum concentration of calcium and vitamin D levels are decreased significantly (P <0.001) when compared to controls. Insulin resistance is predominantly seen in PCOS subjects. The study outlines the importance of insulin resistance, dyslipidemia, decreased serum calcium and vitamin D levels in PCOS subjects may be a cause for the progression of polycystic ovary syndrome.Conclusions: In the present study vitamin D deficiency is highly prevalent in PCOS women from this area compared to control women. We also relations of vitamin D status with insulin sensitivity, HDL-C, and C-reactive protein in PCOS patients, which support the increasing evidence that vitamin D deficiency is associated with multiple metabolic risk factors in PCOS women. A high prevalence of vitamin D deficiency and low calcium levels were observed in PCOS women from our population when compared to controls. Insulin resistance was predominantly seen in PCOS subjects when compared with controls, indicating the association of vitamin D levels with insulin resistance.

scholarly journals Vitamin D: new aspects of application, effective doses. The current state of the problem

2021 ◽  
Vol 17 (1) ◽  
pp. 38-42
Author(s):  
I.V. Pankiv
Keyword(s):  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Large Scale ◽  
Randomized Clinical Trials ◽  
Adult Population ◽  
Daily Intake ◽  
Age Related ◽  
The Status ◽  
Low Efficiency ◽  
Age Related Cognitive Decline

In addition to the classic role of vitamin D in maintaining the normal state of the musculoskeletal system in the last decade, there is evidence that reduced serum concentrations of 25(OH)D are associated with a number of extraskeletal diseases (diabetes mellitus, hypertension, thyroid diseases, age-related cognitive decline, dysfunction of the immune and reproductive systems, etc.). Prevention of these diseases is achieved with significantly higher concentrations of 25(OH)D in the serum than those necessary to maintain normal bone tissue, regulate absorption and maintain calcium homeostasis. To ensure the concentration of the circulating form of vitamin D — 25(OH)D in the serum at a level that ensures optimal functioning, you need a higher consumption of this vitamin. Decreased blood concentration of vitamin D (< 30 ng/ml) is observed in 92 % of the adult population of Ukraine, regardless of the season. The causes of vitamin D deficiency are the low efficiency of its endogenous synthesis in the skin due to insufficient insolation and inadequate intake of this vitamin with food. Due to the half-life of vitamin D of about two months, periodic weekly or monthly intake of total doses of cholecalciferol provides the same values in the serum as daily intake. The review of the lite­rature considers the importance of vitamin D deficiency and deficiency in disorders of many systems of the human body and the development of various pathological conditions, which justifies the wider use of methods to correct the status of vitamin D. Despite the need for large-scale randomized clinical trials to determine the use of vitamin D, now there is no doubt that the normalization of the level of 25(OH)D in the serum is required at all age stages of ontogenesis.

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