scholarly journals Vitamin D levels and risk of COVID-19 infection: A systematic review

2021 ◽  
Vol 19 (2) ◽  
pp. 83-90
Author(s):  
Ana C. Coelho-Oliveira ◽  
Bruno B. Monteiro-Oliveira ◽  
Rebeca B. M. Cavalcante ◽  
Daniel B. Santos ◽  
Anelise Sonza ◽  
...  
Keyword(s):  
Systematic Review ◽  
Vitamin D ◽  
Randomized Clinical Trials ◽  
Vitamin D Supplementation ◽  
Eligibility Criteria ◽  
Hydroxyvitamin D ◽  
Vitamin D Levels ◽  
25 Hydroxyvitamin D ◽  
Novel Coronavirus ◽  
Tract Infections

Objective: Consistent independent associations between lowserum 25-hydroxyvitamin D concentrations and susceptibilityto acute respiratory tract infections have suggested apossible involvement of vitamin D in reducing the risk ofrespiratory infections and proposing its replacement as apotential strategy for prevention or treatment in this context.However, the role of vitamin D supplementation in theinfection by the novel coronavirus named SARS-CoV-2 isstill under investigation and no clinical evidence has beenreported to date. Methods: Electronic searches in Pubmed,Embase and Scopus databases were conducted and threecohort studies that analyzed the effects of interaction ofvitamin D with COVID-19, published only in English, wereincluded. Two reviewers, which independently examinedtitles and abstracts, identified records through database searchand reference screening and irrelevant studies were excludedbased in eligibility criteria. Relevant full texts were analyzedfor eligibility, and all relevant studies were included in thesystematic review. Results: Three cohort studies were includedin this systematic review with a mean methodologicalquality low. Only one study demonstrated interaction of lowvitamin D concentration in patients with a positive diagnosisfor COVID-19. Randomized clinical trials and studies of goodmethodological quality are necessary to confirm the findingsof this systematic review. Conclusions: This systematic reviewhas not demonstrated consistent associations between lowlevels of vitamin D and susceptibility to COVID-19 infection.Further studies on vitamin D supplementation for the preventionof COVID-19 infection should be conducted..

Vitamin D supplementation, body weight and human serum 25-hydroxyvitamin D response: a systematic review

2013 ◽  
Vol 53 (2) ◽  
pp. 367-374 ◽  
Author(s):  
Armin Zittermann ◽  
Jana B. Ernst ◽  
Jan F. Gummert ◽  
Jochen Börgermann
Keyword(s):  
Systematic Review ◽  
Vitamin D ◽  
Body Weight ◽  
Human Serum ◽  
Vitamin D Supplementation ◽  
Hydroxyvitamin D ◽  
25 Hydroxyvitamin D

scholarly journals The Benefits of Vitamin D Supplementation for Athletes: Better Performance and Reduced Risk of COVID-19

Nutrients ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3741
Author(s):  
William B. Grant ◽  
Henry Lahore ◽  
Michelle S. Rockwell
Keyword(s):  
Vitamin D ◽  
Vascular System ◽  
The United States ◽  
Vitamin D Supplementation ◽  
Sporting Events ◽  
Sports Teams ◽  
Hydroxyvitamin D ◽  
Personal Consequences ◽  
25 Hydroxyvitamin D ◽  
Tract Infections

The COVID-19 pandemic is having major economic and personal consequences for collegiate and professional sports. Sporting events have been canceled or postponed, and even when baseball and basketball seasons resumed in the United States recently, no fans were in attendance. As play resumed, several players developed COVID-19, disrupting some of the schedules. A hypothesis now under scientific consideration is that taking vitamin supplements to raise serum 25-hydroxyvitamin D [25(OH)D] concentrations could quickly reduce the risk and/or severity of COVID-19. Several mechanisms have been identified through which vitamin D could reduce the risks of infection and severity, death, and long-haul effects of COVID-19: (1) inducing production of cathelicidin and defensins to reduce the survival and replication of the SARS-CoV-2 virus; (2) reducing inflammation and the production of proinflammatory cytokines and risk of the “cytokine storm” that damages the epithelial layer of the lungs, heart, vascular system, and other organs; and (3) increasing production of angiotensin-converting enzyme 2, thus limiting the amount of angiotensin II available to the virus to cause damage. Clinical trials have confirmed that vitamin D supplementation reduces risk of acute respiratory tract infections, and approximately 30 observational studies have shown that incidence, severity, and death from COVID-19 are inversely correlated with serum 25(OH)D concentrations. Vitamin D supplementation is already familiar to many athletes and sports teams because it improves athletic performance and increases playing longevity. Thus, athletes should consider vitamin D supplementation to serve as an additional means by which to reduce risk of COVID-19 and its consequences.

25-Hydroxyvitamin D levels in serum at the onset of multiple sclerosis

2005 ◽  
Vol 11 (3) ◽  
pp. 266-271 ◽  
Author(s):  
M Soilu-Hänninen ◽  
L Airas ◽  
I Mononen ◽  
A Heikkilä ◽  
M Viljanen ◽  
...  
Keyword(s):  
Vitamin D ◽  
Bone Metabolism ◽  
Sun Exposure ◽  
Serum Levels ◽  
Vitamin D Supplementation ◽  
Hydroxyvitamin D ◽  
Normal Bone ◽  
Vitamin D Levels ◽  
25 Hydroxyvitamin D ◽  
Lower Vitamin

Past sun exposure and vitamin D supplementation have been associated with a reduction in the risk of MS. We measured the serum concentration of 25-hydroxyvitamin D (25[OH]D) at the time of MS diagnosis in 40 MS patients and 40 controls. We found no difference in the serum levels of 25(OH)D between MS patients and controls when all samples or samples obtained during winter months were compared, but MS patients had significantly lower serum 25(OH)D concentrations in June to September than the controls. The vitamin D stores were adequate for bone metabolism (> 37 nmol/L) in 70% of MS patients throughout the year and within the hypovitaminosis level (< 37 nmol/L) in 30% of MS patients at some time of the year. During MS-relapses, 25(OH)D levels were lower than in remission, but mostly within the reference range observed in relation with normal bone metabolism. We conclude that the vitamin D stores in most MS patients are adequate for their normal bone metabolism. However, lower vitamin D levels during MS relapses than in remission suggest that vitamin D could be involved in the regulation of the clinical disease activity of MS. The optimal serum levels of vitamin D for the regulation of immune responses remain to be determined.

scholarly journals Is preoperative calcium and vitamin D supplementation effective in prevention of postoperative hypocalcaemia in thyroidectomised patients?

2021 ◽  
Author(s):  
Anna Grzegory ◽  
Lech Pomorski ◽  
Konrad Pagacz ◽  
Karol Sieniawski ◽  
Krzysztof Kaczka
Keyword(s):  
Vitamin D ◽  
Calcium Carbonate ◽  
Total Thyroidectomy ◽  
Vitamin D Supplementation ◽  
Oral Supplementation ◽  
Hydroxyvitamin D ◽  
Vitamin D Levels ◽  
Group A ◽  
25 Hydroxyvitamin D ◽  
Group B

IntroductionHypocalcaemia remains the most common postoperative complication after total thyroidectomy. The purpose of the study was to evaluate the clinical usefulness of routine preoperative oral calcium and vitamin D supplementation in the prevention of hypocalcaemia after total thyroidectomy.Material and methodsOne hundred fifty-three consecutive patients with nontoxic multinodular goitre were randomly assigned to routinely receive (group B) or not to receive (group A) calcium carbonate (3 g/d) and alfacalcidol (1 µg/d) on the day before surgery and calcium carbonate (1 g/d) and alfacalcidol (1 µg/d) taken once in the morning on the day of operation. Their preoperative 25-hydroxyvitamin D (25-OHD) levels, hypocalcemic symptoms, serum calcium and parathyroid hormone (iPTH) levels were determined 6 and 24 hour postoperatively and 6 weeks after surgery.ResultsSymptomatic hypocalcaemia was observed in 41/153(26.79%) patients. The incidence of symptomatic hypocalcaemia was significantly lower in the supplemented group than in the group not receiving supplementation: 10 of 77 participants (12.99%) versus 31 of 76 patients (40.79%) (p<0.05). The rates of laboratory and severe hypocalcaemia (corrected calcium <2.0 mmol/l) were 67.11% and 28.95% in group A and 50.65% and 9.09% in group B, respectively (p=0.04, p<0.05). There were no significant differences between groups A and B in corrected calcium levels after surgery and postoperative decreases in corrected calcium levels (p=0.06). 112(73.20%) participants had 25-OHD<20 ng/ml. Vitamin D levels did not influence corrected calcium level changes (p=0.98).ConclusionsOral supplementation of calcium and alfacalcidol may help in the prevention of postthyroidectomy hypocalcaemia. Vitamin D deficiency was widespread among operated patients.

scholarly journals Fall in Vitamin D Levels during Hospitalization in Children

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Devi Dayal ◽  
Suresh Kumar ◽  
Naresh Sachdeva ◽  
Rakesh Kumar ◽  
Meenu Singh ◽  
...  
Keyword(s):  
Vitamin D ◽  
Hospital Stay ◽  
Vitamin D Supplementation ◽  
Healthcare Associated Infection ◽  
Hydroxyvitamin D ◽  
Vitamin D Levels ◽  
25 Hydroxyvitamin D ◽  
The Mean ◽  
The Difference ◽  
Healthcare Associated

Plasma levels of 25-hydroxyvitamin D [25(OH)D] were measured by competitive Electrochemiluminescence Immunoassay (ECLIA) in 92 children (67 boys, 25 girls) aged 3 months to 12 years at admission to hospital (timepoint 1, T1) and at discharge (timepoint 2, T2). There was a significant fall in the mean 25(OH)D from T1 (71.87 ± 27.25 nmol/L) to T2 (49.03 ± 22.25 nmol/L) (mean change = 22.84 nmol/L,Pvalue = 0.0004). Proportion of patients having VDD (levels <50 nmol/L) at admission (25%, 23/92) increased significantly at the time of discharge (51.09%, 47/92) (P=0.0004). There was a trend towards longer duration of hospital stay, requirement of ventilation and inotropes, development of healthcare-associated infection, and mortality in vitamin D deficient as compared to nondeficient patients though the difference was statistically insignificant. In conclusion, vitamin D levels fall significantly and should be monitored during hospital stay in children. Large clinical studies are needed to prospectively evaluate the effect of vitamin D supplementation in vitamin D deficient hospitalized children on various disease outcome parameters.

Correlation between vitamin D levels and hard-to-heal wounds: a systematic review

2020 ◽  
Vol 29 (Sup7) ◽  
pp. S24-S30 ◽  
Author(s):  
Karen Smith ◽  
Susan Hewlings
Keyword(s):  
Vitamin D ◽  
Financial Burden ◽  
Vitamin D Supplementation ◽  
Nutritional Deficiencies ◽  
Vitamin D Status ◽  
Hydroxyvitamin D ◽  
Venous Ulcers ◽  
Vitamin D Levels ◽  
25 Hydroxyvitamin D ◽  
The Relationship

Objective: Hard-to-heal wounds are a major biological, psychological, social and financial burden on both individual patients and the broader health system. They are associated with a variety of comorbidities and have a complex aetiology, but are typically associated with nutritional deficiencies, such as low vitamin D levels. This systematic literature review evaluates the current research regarding the connection between inadequate vitamin D status and wound healing. Method: PubMed and EBSCO databases were searched following PRISMA guidelines for primary research studies relating to pressure ulcers, diabetic ulcers or venous ulcers and vitamin D status. Results: A total of 10 studies, involving 2359 participants, met the inclusion criteria. There was a strong correlation between low levels of 25-hydroxyvitamin D and the presence of all three types of hard-to-heal wounds. Conclusion: Research suggests a correlation between low vitamin D levels and hard-to-heal wounds. However, it is not clear if the relationship is causal or only correlational. There is also emerging evidence on the use of vitamin D supplementation for the treatment of hard-to-heal wounds. More research is needed to understand the correlation between vitamin D and hard-to-heal wounds.

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