scholarly journals Physical Performance and Vitamin D in Elderly Black Women–The PODA Randomized Clinical Trial

2018 ◽  
Vol 104 (5) ◽  
pp. 1441-1448 ◽  
Author(s):  
John F Aloia ◽  
Mageda Mikhail ◽  
Melissa Fazzari ◽  
Shahidul Islam ◽  
Louis Ragolia ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Vitamin D ◽  
Black Women ◽  
Randomized Clinical Trial ◽  
Physical Performance

Supplementation with vitamin D and insulin homeostasis in healthy overweight and obese adults: A randomized clinical trial

2021 ◽  
Author(s):  
Seyed Alireza Ebadi ◽  
Laleh Sharifi ◽  
Elaheh Rashidi ◽  
Seyed Shayan Ebadi ◽  
Shayesteh Khalili ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Vitamin D ◽  
Randomized Clinical Trial ◽  
Obese Adults ◽  
Insulin Homeostasis

The relation between sunscreen layer thickness and vitamin D production after ultraviolet B exposure: a randomized clinical trial

2012 ◽  
Vol 167 (2) ◽  
pp. 391-395 ◽  
Author(s):  
A. Faurschou ◽  
D.M. Beyer ◽  
A. Schmedes ◽  
M.K. Bogh ◽  
P.A. Philipsen ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Vitamin D ◽  
Randomized Clinical Trial ◽  
Layer Thickness ◽  
Ultraviolet B

scholarly journals Effects of vitamin D supplementation on red cell indices and cytokines in patients with thalassemia: An open-label randomized clinical trial

2019 ◽  
pp. 170-179
Keyword(s):  
Clinical Trial ◽  
Vitamin D ◽  
Randomized Clinical Trial ◽  
Thalassemia Major ◽  
Vitamin D Supplementation ◽  
Beta Thalassemia ◽  
Red Cell ◽  
Open Label ◽  
Hematological Indices ◽  
Red Cell Indices

Background and aim Deficiency of vitamin D is known as a health problem all over the world and a recognized clinical complication of beta thalassemia patients. Vitamin D acts as a hormone at the nuclear receptor rendering it a beneficial medication for a number of diseases. It is believed that vitamin D is important in the modulation of the inflammation system by regulating the formation of inflammatory cytokines and immune cells. This study aimed to investigate the effect of vitamin D supplementation on the red cell indices and cytokines levels in patients with beta thalassemia major, in an open label randomized clinical trial. Patients and Methods: this study performed an open-label randomized clinical trial in patients with beta thalassemia major. Forty-six patients completed the eight weeks clinical trial and were allocated to administer oral vitamin D3 supplement of 100,000 IU every two weeks as an add-on treatment. During the study, hematological indices, serum iron, ferritin, vitamin D, calcium and inflammatory markers (interleukin-6, interleukin-2 and interleukin-10) were evaluated before (at baseline) and after vitamin D supplementation for 8 weeks. Results: Vitamin D3 supplements significantly decreases interleukin-6 levels and elevates the serum levels of anti-inflammatory cytokines IL-2 and IL-10, it also significantly reduced serum ferritin level, but it did not alter the hematological indices. Conclusion: Our results suggest that administration of vitamin D has a potential anti-inflammatory role in beta thalassemia patients and reduces serum ferritin levels, which may reduce the burdens of iron overload in thalassemia patients.

scholarly journals Effects of Vitamin D3 Supplementation on Epigenetic Aging in Overweight and Obese African Americans With Suboptimal Vitamin D Status: A Randomized Clinical Trial

2018 ◽  
Vol 74 (1) ◽  
pp. 91-98 ◽  
Author(s):  
Li Chen ◽  
Yanbin Dong ◽  
Jigar Bhagatwala ◽  
Anas Raed ◽  
Ying Huang ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Dna Methylation ◽  
Vitamin D ◽  
African Americans ◽  
Randomized Clinical Trial ◽  
Vitamin D3 ◽  
Vitamin D Supplementation ◽  
P Value ◽  
Epigenetic Aging ◽  
Vitamin D3 Supplementation

Abstract Background We have previously shown that vitamin D supplementation increases telomerase activity, suggesting an anti-aging effect. In this study, we aim to test the hypothesis that vitamin D supplementation would slow down epigenetic aging, a new marker of biological aging. Methods A randomized clinical trial was previously conducted among 70 overweight/obese African Americans with serum 25-hydroxyvitamin D [25(OH)D] < 50 nmol/L, who were randomly assigned into four groups of 600 IU/d, 2,000 IU/d, 4,000 IU/d of vitamin D3 supplements or placebo followed by 16-week interventions. Whole genome-wide DNA methylation analysis was conducted in 51 participants. DNA methylation ages were calculated according to the Horvath and the Hannum methods. Methylation-based age acceleration index (∆Age) is defined as the difference between DNA methylation age and chronological age in years. Mixed-effects models were used to evaluate the treatment effects. Results Fifty-one participants (aged 26.1 ± 9.3 years, 16% are male) were included in the study. After the adjustment of multi-covariates, vitamin D3 supplementation of 4,000 IU/d was associated with 1.85 years decrease in Horvath epigenetic aging compared with placebo (p value = .046), and 2,000 IU/d was associated with 1.90 years decrease in Hannum epigenetic aging (p value = .044). Serum 25(OH)D concentrations were significantly associated with decreased Horvath ∆Age only (p values = .002), regardless of treatments. Conclusions Our results suggest that vitamin D supplementation may slow down Horvath epigenetic aging. But the effect on Hannum epigenetic aging is not conclusive. Large-scale and longer duration clinical trials are needed to replicate the findings.

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