Association of vitamin D status with COVID-19 and its severity

Association of Vitamin D Status With Liver and Kidney Disease: A Systematic Review of Clinical Trials, and Cross-Sectional and Cohort Studies

International Journal for Vitamin and Nutrition Research ◽

10.1024/0300-9831/a000540 ◽

2019 ◽

pp. 1-13 ◽

Cited By ~ 2

Author(s):

Seyed Mostafa Parizadeh ◽

Majid Rezayi ◽

Reza Jafarzadeh-Esfehani ◽

Amir Avan ◽

Hamideh Ghazizadeh ◽

...

Keyword(s):

Vitamin D ◽

Kidney Disease ◽

Renal Disease ◽

Cohort Studies ◽

Cochrane Library ◽

Major Public Health Problem ◽

Vitamin D Status ◽

Cross Sectional ◽

Beneficial Effects ◽

Vitamin D Levels

Abstract. Background: Vitamin D deficiency (VDD) is a major public health problem. There are few comprehensive systematic reviews about the relationship between Vitamin D status and liver and renal disease in Iran. Methods: We systemically searched the following databases: Web of Science; PubMed; Cochrane Library; Scopus; Science Direct; Google Scholar and two Iranian databases (Scientific Information Database (SID) and IranMedex) up until November 2017 to identify all randomized control trials (RCTs), case control, cross-sectional and cohort studies investigating the association between vitamin D and any form of liver or kidney disease. Results: Vitamin D insufficiency, or deficiency (VDD), is highly prevalent in Iran, reports varying between 44.4% in Isfahan to 98% in Gorgan. There is also a high prevalence of VDD among patients with liver or kidney disease, and the administration of vitamin D supplements may have beneficial effects on lipid profile, blood glucose, liver function and fatty liver disease, and bone health. Low serum vitamin D levels are related with abnormalities in these laboratory and clinical parameters. Conclusion: VDD is prevalent in patients with chronic liver or renal disease in Iran. There appear to be several beneficial effects of vitamin D supplementation in vitamin D deficient patients with liver or kidney disease.

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

International Journal for Vitamin and Nutrition Research ◽

10.1024/0300-9831/a000220 ◽

2015 ◽

Vol 85 (1-2) ◽

pp. 23-30 ◽

Cited By ~ 19

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.

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Vitamin D Deficiency/Insufficiency and Challenges in Developing Global Vitamin D Fortification and Supplementation Policy in Adults

International Journal for Vitamin and Nutrition Research ◽

10.1024/0300-9831/a000117 ◽

2012 ◽

Vol 82 (4) ◽

pp. 237-259 ◽

Cited By ~ 9

Author(s):

Moshe Ben-Shoshan

Keyword(s):

Vitamin D ◽

Vitamin D Deficiency ◽

Search Strategy ◽

Epidemiologic Studies ◽

Vitamin D Supplementation ◽

Vitamin D Status ◽

Societal Burden ◽

Time Period ◽

New Guidelines ◽

In Cis

This review summarizes studies discussing vitamin D status in adults and reveals that vitamin D deficiency/insufficiency is highly prevalent in adults and that current fortification and supplementation policies are inadequate. Background and aims: Studies suggest a crucial role for adequate vitamin D status in various health conditions including bone metabolism, cancer, cardiovascular diseases, and allergies. However, relatively little is known about poor vitamin D status and unmet needs in adults. This report aims to highlight the contribution of epidemiologic studies (through the identification of health effects and societal burden) to the development of vitamin D fortification and supplementation policies and reveal unmet global challenges in adults. Methods: In order to assess worldwide vitamin D status in adults, the search strategy combined the medical literature database MEDLINE (using PubMed) for the time period between January 1, 1980 and February 28, 2011, using the key words vitamin D deficiency and insufficiency, and included articles in which access to full text was possible and in which healthy adults were assessed according to one of four commonly used vitamin D threshold classifications. Results: This report reveals that vitamin D deficiency occurs in 4.10 % [95 % CI (confidence interval), 3.93 %, 4.27 %] to 55.05 % (54.07 %, 56.03 %) of adults, while insufficiency occurs in 26.07 % (24.82 %, 27.33 %) to 78.50 % (77.85 %, 79.16 %), depending on the classification used. However, lack of overlap in CIs and high value of I2 statistics indicate considerable heterogeneity between studies. Further, certain populations (i. e. dark-skinned individuals, immigrants, and pregnant women) may be at higher risk for poor vitamin D status. Conclusion: Current policies for vitamin D supplementation and fortification are inadequate and new guidelines are required to improve vitamin D status in adults.

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