scholarly journals Inadequate vitamin D status: does it contribute to the disorders comprising syndrome ‘X’?

1998 ◽  
Vol 79 (4) ◽  
pp. 315-327 ◽  
Author(s):  
B. J. Boucher
Keyword(s):  
Risk Factors ◽  
Myocardial Infarction ◽  
Vitamin D ◽  
Insulin Secretion ◽  
Glucose Tolerance ◽  
Vitamin D Deficiency ◽  
Glucose Intolerance ◽  
Syndrome X ◽  
Vitamin D Status ◽  
Increased Risk

Environmental factors are important in the aetiology of glucose intolerance, type II diabetes and IHD. The lack of vitamin D, which is necessary for adequate insulin secretion, relates demographically to increased risk of myocardial infarction. These disorders are connected, degenerative vascular disease increasing with glucose intolerance and diabetes and, with its risk factors, comprising syndrome ‘X’. Evidence is presented suggesting that vitamin D deficiency may be an avoidable risk factor for syndrome ‘X’, adding another preventative measure to current recommendations which are aimed at reducing the worldwide epidemic of these disorders. Experimentally, vitamin D deficiency progressively reduces insulin secretion; glucose intolerance follows and becomes irreversible. Relationships between vitamin D status, glucose tolerance and 30 min insulin secretion during oral glucose tolerance tests are reported in British Asians; insulin secretion, but not glycaemia, improving with short-term supplementation. Studies showing reduction in blood pressure and in risk of heart attack and diabetes with exercise (usually outdoor), rarely consider the role of vitamin D status. Glycaemia and insulin secretion in elderly European men, however, relate to vitamin D status, independent of season or physical activity. Prolonged supplementation can improve glycaemia. Hypertension improves with vitamin D treatment with or without initial deficiency. Vitamin D status and climate are reviewed as risk factors for myocardial infarction; the risk reducing with altitude despite increasing cold. Glycaemia and fibrinogenaemia improve and insulin secretion increases in summer. Variation in vitamin D requirements could arise from genetic differences in vitamin D processing since bone density can vary with vitamin D-receptor genotype. Vitamin D receptors are present in islet β cells and we report insulin secretion in healthy Asians differing profoundly with the Apa I genotype, being independent of vitamin D status. Those at risk of vitamin D deficiency include the elderly, those living indoors or having a covered-up style of dress, especially dark-skinned immigrants, and pregnant women, and these are groups recognized as being at increased risk of diabetes.

Association between vitamin D deficiency and prevalence of metabolic syndrome in female population: a systematic review

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Nazila Fathi Maroufi ◽  
Pourya Pezeshgi ◽  
Zohreh Mortezania ◽  
Pirouz Pourmohammad ◽  
Reyhaneh Eftekhari ◽  
...  
Keyword(s):  
Risk Factors ◽  
Blood Pressure ◽  
Metabolic Syndrome ◽  
Vitamin D ◽  
Vitamin D Deficiency ◽  
High Blood Pressure ◽  
Fast Blood Sugar ◽  
Syndrome X ◽  
Vitamin D Status ◽  
Female Population

AbstractBackgroundThe increasing prevalence of metabolic syndrome (MS) especially in female population, has become a major problem in health care systems. In this regards, it is necessary to identify the risk factors. Vitamin D deficiency is now proposed as one of the possible risk factors for metabolic syndrome, we investigated the relationship between vitamin D status and MS in female.MethodsWe searched observational studies with keywords Vitamin D, metabolic syndrome, metabolic syndrome X, insulin-resistance syndrome, metabolic cardiovascular syndrome and Reaven Syndrome X and female in pubmed, scopus, science direct, cochrane, web of science, google scholar and SID databases, regardless of publication time. Two hundred ninety five studies were found, and finally only 12 articles were selected according to exclusion and inclusion criteria.ResultsIn nine studies that reported the prevalence of MS, the prevalence of MS among women with vitamin D deficiency was higher than female with normal vitamin D (34.5 vs. 30.2%). The prevalence of abdominal obesity, high blood pressure, high TG and HDL deficiency is higher in women with vitamin D deficiency. Also, the mean waist circumference, blood pressure, fast blood sugar (FBS), TG and BMI were higher. The most incident factor was high blood pressure (61.4 vs. 56.5%) and the lowest prevalence is associated with high FBS (32.2 vs. 33.5% in the other group).ConclusionThe prevalence of MS is significantly associated with vitamin D deficiency, and among related factors, HDL, TG and blood pressure are statistically associated with vitamin D status.

Vitamin D Deficiency in Patients with Acute Myocardial Infarction: An Italian Single-Center Study

2015 ◽  
Vol 85 (1-2) ◽  
pp. 23-30 ◽  
Author(s):  
Aneta Aleksova ◽  
Rita Belfiore ◽  
Cosimo Carriere ◽  
Salam Kassem ◽  
Salvatore La Carrubba ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Primary Source ◽  
Sun Exposure ◽  
Female Gender ◽  
Developed Countries ◽  
Vitamin D Status ◽  
High Exposure

Abstract. Background: Hypovitaminosis D is a vitamin deficiency that has been increasing in developed countries; it was also suggested as an emerging risk factor for developing of atherosclerosis and acute myocardial infarction. The primary source of vitamin D is its cutaneous synthesis under exposure to sunlight. It has been suggested that 30 min of sun exposure twice weekly leads to sufficient vitamin D synthesis. The residents of Trieste (Italy) are well-known for their high exposure to sunlight in all seasons. We aimed to investigate the vitamin D status in subjects with acute myocardial infarction living in this area. Methods: Vitamin D status was identified in 478 subjects diagnosed with acute myocardial infarction. Results: The median serum 25-hydroxyvitamin D concentration was 14.5 [7.8 - 22.7] ng/mL. Vitamin D deficiency and insufficiency were present in 324 (68 %) and 107 (22 %) subjects, respectively. Vitamin D deficiency was less frequent among subjects enrolled in the period from July to the end of September (p < 0.001). In a multivariate analysis vitamin D deficiency was predicted by older age (p = 0.02), female gender (p = 0.002), higher body mass index (p = 0.05), autumn/winter sampling (p < 0.001), increased parathyroid hormone (p = 0.03) and alkaline phosphatase (p = 0.003). Conclusions: We observed very high prevalence of vitamin D deficiency among subjects with myocardial infarction in all seasons of enrollment. However, it was lower in the summer when sun exposure is higher. The exposure to sunlight may be a cost-saving therapeutic strategy for the management of vitamin D deficiency.

scholarly journals Vitamin D and Cardiovascular Disease: An Updated Narrative Review

2021 ◽  
Vol 22 (6) ◽  
pp. 2896
Author(s):  
Armin Zittermann ◽  
Christian Trummer ◽  
Verena Theiler-Schwetz ◽  
Elisabeth Lerchbaum ◽  
Winfried März ◽  
...  
Keyword(s):  
Cardiovascular Disease ◽  
Vitamin D ◽  
High Risk ◽  
General Population ◽  
Vitamin D Deficiency ◽  
Specific Gene ◽  
Vitamin D Status ◽  
Cvd Risk ◽  
Severe Vitamin ◽  
Increased Risk

During the last two decades, the potential impact of vitamin D on the risk of cardiovascular disease (CVD) has been rigorously studied. Data regarding the effect of vitamin D on CVD risk are puzzling: observational data indicate an inverse nonlinear association between vitamin D status and CVD events, with the highest CVD risk at severe vitamin D deficiency; however, preclinical data and randomized controlled trials (RCTs) show several beneficial effects of vitamin D on the surrogate parameters of vascular and cardiac function. By contrast, Mendelian randomization studies and large RCTs in the general population and in patients with chronic kidney disease, a high-risk group for CVD events, largely report no significant beneficial effect of vitamin D treatment on CVD events. In patients with rickets and osteomalacia, cardiovascular complications are infrequently reported, except for an increased risk of heart failure. In conclusion, there is no strong evidence for beneficial vitamin D effects on CVD risk, either in the general population or in high-risk groups. Whether some subgroups such as individuals with severe vitamin D deficiency or a combination of low vitamin D status with specific gene variants and/or certain nutrition/lifestyle factors would benefit from vitamin D (metabolite) administration, remains to be studied.

scholarly journals Is Vitamin D Deficiency Related to Increased Cancer Risk in Patients with Type 2 Diabetes Mellitus?

2021 ◽  
Vol 22 (12) ◽  
pp. 6444
Author(s):  
Anna Gabryanczyk ◽  
Sylwia Klimczak ◽  
Izabela Szymczak-Pajor ◽  
Agnieszka Śliwińska
Keyword(s):  
Diabetes Mellitus ◽  
Risk Factors ◽  
Insulin Resistance ◽  
Type 2 Diabetes ◽  
Vitamin D ◽  
Cancer Risk ◽  
Vitamin D Deficiency ◽  
Cancer Development ◽  
Increased Risk

There is mounting evidence that type 2 diabetes mellitus (T2DM) is related with increased risk for the development of cancer. Apart from shared common risk factors typical for both diseases, diabetes driven factors including hyperinsulinemia, insulin resistance, hyperglycemia and low grade chronic inflammation are of great importance. Recently, vitamin D deficiency was reported to be associated with the pathogenesis of numerous diseases, including T2DM and cancer. However, little is known whether vitamin D deficiency may be responsible for elevated cancer risk development in T2DM patients. Therefore, the aim of the current review is to identify the molecular mechanisms by which vitamin D deficiency may contribute to cancer development in T2DM patients. Vitamin D via alleviation of insulin resistance, hyperglycemia, oxidative stress and inflammation reduces diabetes driven cancer risk factors. Moreover, vitamin D strengthens the DNA repair process, and regulates apoptosis and autophagy of cancer cells as well as signaling pathways involved in tumorigenesis i.e., tumor growth factor β (TGFβ), insulin-like growth factor (IGF) and Wnt-β-Cathenin. It should also be underlined that many types of cancer cells present alterations in vitamin D metabolism and action as a result of Vitamin D Receptor (VDR) and CYP27B1 expression dysregulation. Although, numerous studies revealed that adequate vitamin D concentration prevents or delays T2DM and cancer development, little is known how the vitamin affects cancer risk among T2DM patients. There is a pressing need for randomized clinical trials to clarify whether vitamin D deficiency may be a factor responsible for increased risk of cancer in T2DM patients, and whether the use of the vitamin by patients with diabetes and cancer may improve cancer prognosis and metabolic control of diabetes.

scholarly journals Vitamin D deficiency in postmenopausal, healthy women predicts increased cardiovascular events: a 16-year follow-up study

2012 ◽  
Vol 167 (4) ◽  
pp. 553-560 ◽  
Author(s):  
Louise Lind Schierbeck ◽  
Lars Rejnmark ◽  
Charlotte Landbo Tofteng ◽  
Lis Stilgren ◽  
Pia Eiken ◽  
...  
Keyword(s):  
Risk Factors ◽  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Cardiovascular Events ◽  
Serum Levels ◽  
Cardiovascular Outcome ◽  
Osteoporosis Prevention ◽  
Healthy Women ◽  
End Point ◽  
Increased Risk

ObjectiveTo investigate the relationship between vitamin D status in healthy women and cardiovascular outcome.Design and methodsBetween 1990 and 1993, 2016 healthy, recently postmenopausal women were enrolled in the Danish Osteoporosis Prevention Study. Serum levels of 25-hydroxyvitamin D (25(OH)D, nmol/l) were measured at baseline. Participants were followed for 16 years. The primary end point was a combination of death, heart failure, myocardial infarction (MI) and stroke. Vitamin D deficiency was defined as serum 25(OH)D<50 nmol/l. The primary end point was adjusted for other risk factors of adverse cardiovascular events (age, smoking, blood pressure, hip–waist ratio, education and family history of MI).ResultsAt baseline, mean age was 50 years and BMI 25. Women with vitamin D deficiency (n=788) had more cardiovascular risk factors than vitamin D-replete women (n=1225). Compared with vitamin D-replete women, women with low 25(OH)D levels had significantly higher BMI and triglycerides, lower HDL and hip–waist ratio and less education. More were smokers among the vitamin D deficient (47 vs 38%). A primary end point was experienced by 118 (15%) with vitamin D deficiency and by 125 (10%) of the vitamin D replete. Hazard ratio (HR) was 1.49 (95% confidence interval: 1.16–1.92;P=0.002) in the vitamin D deficient. Adjusted HR was 1.32 (1.02–1.71;P=0.03). In total, 135 women died; of these, 65 (8%) were of the vitamin D deficient and 70 (6%) in the vitamin D-replete group; unadjusted HR was 1.44 (1.02–2.01;P=0.04) for vitamin D deficiency.ConclusionHealthy women with vitamin D deficiency have increased risk of adverse cardiovascular outcome.

scholarly journals Assessment of risk factors associated with vitamin D status among children of an urban and a rural areas of Bangladesh

2020 ◽  
Vol 46 (2) ◽  
pp. 134-141
Author(s):  
Anamika Saha ◽  
Md Salim Shakur ◽  
Runa Laila ◽  
Salomee Shakur ◽  
Md Sohel Shomik ◽  
...  
Keyword(s):  
Risk Factors ◽  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Hypovitaminosis D ◽  
Urban Children ◽  
Outpatient Department ◽  
P Value ◽  
Rural Children ◽  
Vitamin D Status ◽  
Factors Associated

Background: Vitamin D deficiency is one of the most common micronutrient deficiency in children worldwide, even in Bangladesh. However, to date, the prevalence of vitamin D deficiency among children of different region of Bangladesh is less reported. Objective: This study was conducted to assess vitamin D status of urban and rural Bangladeshi children including the risk factors associated with vitamin D deficiency are also evaluated. Methods: A multi-centre (urban and rural based), cross sectional study was done from July 2016 to June 2017, using serum 25(OH) vitamin D3 as a marker of nutritional vitamin D status. Urban and rural children were taken from Paediatric Outpatient Department, United Hospital Limited. Dhaka and Medical Outpatient Department, Upazila Health Complex, Ghatail, Tangail respectively. Children of 1-10 years age attending OPD with mild undernutrition (<–1 SD z score) and/or clinical features suggestive of vitamin D deficiency were included in the study. Results: A total 150 children were studied with 102 (68.0%) urban and 48 (32.0%) rural children. Hypovitaminosis D (25-OHD <30ng/ml) was found in 75.0% of children. Hypovitaminosis D was found significantly more in urban children (81.0%) compared to rural (62.0%) children (OR=0.382, 95% CI: 0.177-0.822, p value <0.05). Inadequate exposure to sunlight was significantly associated with hypovitaminosis D compared to adequate sun exposure and it was about 2.5 times higher (OR=2.475, 95% CI: 1.139-5.380, p value <0.05). No significant associations of vitamin D deficiency were detected with skin color of children, covering clothes of mother, exclusive breast feeding, limb pain and anthropometric status. Children of higher educated mother (above Secondary School Certificate) (OR=0.412, 95% CI: 0.189-0.900) were more associated with vitamin D deficiency. Conclusion: Vitamin D deficiency (VDD) is prevalent among Bangladeshi children, urban children being more vulnerable to VDD. Adoption of a screening programme for children of all age group and implementation of preventive strategies for VDD through public health policies are strongly recommended. Bangladesh Med Res Counc Bull 2020; 46(2): 134-141

Influence of Vitamin D Status on Insulin Secretion and Glucose Tolerance in the Rabbit*

Endocrinology ◽  
1984 ◽  
Vol 115 (1) ◽  
pp. 191-197 ◽  
Author(s):  
BULANGU L. NYOMBA ◽  
ROGER BOUILLON ◽  
PIETER DE MOOR
Keyword(s):  
Vitamin D ◽  
Insulin Secretion ◽  
Glucose Tolerance ◽  
Vitamin D Status

scholarly journals Vitamin D Status and Its Associated Risk Factors among Adults in the Southwest Region of Cameroon

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Delphine A. Tangoh ◽  
Tobias O. Apinjoh ◽  
Yasir Mahmood ◽  
Robert V. Nyingchu ◽  
Beatrice A. Tangunyi ◽  
...  
Keyword(s):  
Risk Factors ◽  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Hypovitaminosis D ◽  
Vitamin D Status ◽  
West Region ◽  
South West ◽  
Study Population ◽  
Associated Risk Factors ◽  
South West Region

Background. Vitamin D has been shown to exert its actions on the musculoskeletal, gastrointestinal, prostate, renal, endocrine, immune, and cardiovascular systems. Current reported data of hypovitaminosis D reveals a global pandemic, with an estimated one billion people worldwide presenting with hypovitaminosis D. Objective. This study aimed at investigating the vitamin D status and its associated risk factors in Cameroonians from the South West Region. Method. The study was a community- and hospital-based prospective longitudinal study. It was carried out during the dry and rainy seasons between the months of July and December 2015 in the South West Region of Cameroon involving 372 participants aged 35 years and above. After obtaining informed consent, a structured questionnaire was used to capture demographic data and risk factors of vitamin D deficiency. Blood samples were collected from the volunteer participants in the peak months of the rainy season and dry season, and the serum used to analyse for vitamin D by ELISA and calcium by spectrophotometry. 25(OH)D levels ≥75 nmol/L (≥30 ng/mL) were considered sufficient while levels <75 nmol/L were considered as hypovitaminosis D (insufficiency/deficiency). Results. Hypovitaminosis D (deficiency/insufficiency) was prevalent in 25.8% (96) of the study population, with only 3.2% (12) deficiency and 22.6% (84) insufficiency. There was a significant inverse relationship r=−0.119,p=0.02 between age and 25(OH)D levels; however, this relationship was not significant when controlled for gender, number of hours spent outdoors, and percentage of body covered. Gender, ethnic origin, percentage of body covered, time spent outdoors, and season did not influence serum vitamin D levels. Conclusion. Results of this study suggest that the prevalence of hypovitaminosis D is relatively low in this study population and only age is a risk factor of vitamin D deficiency.

scholarly journals The Prevalence of Hypovitaminosis D and Its Associated Risk Factors Among Women of Reproductive Age in Saudi Arabia: A Systematic Review and Meta-Analysis

2018 ◽  
Vol 11 ◽  
pp. 1179562X1876788 ◽  
Author(s):  
Riyadh A Alzaheb
Keyword(s):  
Risk Factors ◽  
Vitamin D ◽  
Saudi Arabia ◽  
Vitamin D Deficiency ◽  
Meta Analysis ◽  
Hypovitaminosis D ◽  
Reproductive Age ◽  
Vitamin D Status ◽  
Women Of Reproductive Age ◽  
Associated Risk Factors

Vitamin D deficiency is currently a worldwide epidemic. Middle Eastern countries, including Saudi Arabia, have high vitamin D deficiency prevalence, most prominently among women, despite their plentiful year-round sunshine. Previous research investigating vitamin D status among Saudi women of reproductive age (15-49 years) is scarce, and no study has used a nationally representative sample, so this review quantified overall hypovitaminosis D prevalence among women in Saudi Arabia and explored the associated risk factors. The Web of Science, Scopus, and Medline databases were searched for prior studies in Saudi Arabia exploring vitamin D status among women of reproductive age, published between January 1, 2000 and May 25, 2017. Data were extracted from the identified studies, and a random effects model meta-analysis established the overall hypovitaminosis D prevalence. The initial search yielded 223 possibly relevant articles; 13 were confirmed as eligible, with samples totaling 2877 women aged between 15 and 49 years. Meta-analysis revealed a mean serum 25-hydroxyvitamin D, 25(OH)D, level of 13.1 ng/mL (95% confidence interval [CI]: 11.6-14.6) and an overall prevalence of hypovitaminosis D, defined as 25(OH)D < 30 ng/mL, of 77.4% (95% CI: 63.2-87.3), mostly due to insufficient sunlight exposure and low dietary vitamin D intake. There is therefore a need for a national strategy to raise vitamin D levels among women in Saudi Arabia by advising them on natural vitamin D sources, and recommending the timing and duration of sun exposure, while also defining a national approach to vitamin D fortification and supplementation.

scholarly journals Vitamin D status and risk factors among pregnancy of shanghai in China

2021 ◽  
Author(s):  
chun yang ◽  
Jing Wu ◽  
Sheng Ge ◽  
Wenguang Sun
Keyword(s):  
Diabetes Mellitus ◽  
Risk Factors ◽  
Vitamin D ◽  
Gestational Diabetes ◽  
Gestational Diabetes Mellitus ◽  
Vitamin D Deficiency ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Low Density ◽  
Vitamin D Status

Abstract Background This study was to assess vitamin D nutritional status and risk factors among pregnancy of shanghai in China. Methods A cross-sectional study conducted in the Sixth Affiliated People’s Hospital of Shanghai Jiao Tong University. All pregnancy was measured for plasma vitamin D, total blood cholesterol (TCh), high-density lipoprotein (HDL), low-density lipoprotein (LDL) or very-low-density lipoprotein (VLDL) cholesterol and triglycerides, and completed OGTTs test. Age, height, and weight variables came from their electronic medical records. Criteria for vitamin D status were: <12 ng/ml: severe deficiency; 12–19 ng/ml: deficiency; 20–29 ng/ml: insufficiency; 30–50 ng/ml: normal; and > 50 ng/ml (particularly > 60 ng/ml): possibly leading to adverse effects. Vitamin D was measured from December 2016 to April 2017. Results Our study included 953 pregnant women. The mean vitamin D level of pregnancy was 16.06 (range 10.90 to 20.60) ng/ml,and severe vitamin D deficiency was 31.79%(303); vitamin D deficiency was 40.71 %(388); vitamin D insufficiency was 25.08%(239); normal vitamin D was 2.42%(23). Vitamin D deficiency risk factors were age over 30, parity over 2, overweight, obese, gestational diabetes mellitus, and hyperglycemia. Conclusions It is a high prevalence of vitamin D deficiency of Chinese pregnancy in shanghai. Aging more than 30 years, the parity of more than 2, overweight and obesity, gestational diabetes mellitus and hyperglycemia are risk factors for vitamin D deficiency. Public health strategies should focus on the population of pregnancy in shanghai in China.

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