High-dose Cholecalciferol Supplementation Reducing Morning Blood Pressure in Normotensive DM1 Patients

2020 ◽  
Vol 16 ◽  
Author(s):  
Natércia Neves Marques de Queiroz ◽  
Franciane Trindade Cunha de Melo ◽  
Fabrício de Souza Resende ◽  
Luísa Corrêa Janaú ◽  
Norberto Jorge Kzan de Souza Neto ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Vitamin D ◽  
Blood Pressure Monitoring ◽  
Vitamin D Supplementation ◽  
High Dose ◽  
Before And After ◽  
Patients With Diabetes ◽  
Morning Blood Pressure ◽  
Cholecalciferol Supplementation ◽  
Lipids Profile

Background: Vitamin D (VD) deficiency has been related to several endocrine metabolic and cardiovascular diseases. Effect of VD supplementation on blood pressure (BP) in patients with diabetes is controversial. Objective: The aim of this study was to evaluate high-dose vitamin D supplementation effects on blood pressure of normotensive type 1 diabetes mellitus (T1DM) patients by 24-hour ambulatory blood pressure monitoring (ABPM). Methods: We performed a clinical trial including 35 T1DM normotensive patients, who received doses of 4,000 or 10,000 IU/day of cholecalciferol for 12 weeks according to previous VD levels. They underwent 24-hour ABPM, along with glycated hemoglobin, creatine, lipids profile and PCRus dosage before and after VD supplementation. Results and discussion: We found an expressive reduction of systolic and diastolic morning blood pressures (117±14 vs 112±14, p<0,05; 74±9 vs 70±10 mmHg, p<0,05, respectively) with no changes in other pressoric markers. Besides, we noticed a relation between levels of VD after supplementation and diastolic morning blood pressure (r= -0,4; p<0.05). Conclusion: Our study suggests an association between supplementation of high doses of vitamin D and the reduction of morning blood pressure in normotensive T1DM patients.

scholarly journals Efficacy of single-dose cholecalciferol in the blood pressure of patients with type 2 diabetes, hypertension and hypovitaminoses D

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Tatiana P. de Paula ◽  
Juliano S. R. Moreira ◽  
Luiza F. Sperb ◽  
Maria Elisa P. Muller ◽  
Thais Steemburgo ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Type 2 Diabetes ◽  
Vitamin D ◽  
Single Dose ◽  
Blood Pressure Monitoring ◽  
Hypovitaminosis D ◽  
Vitamin D Insufficiency ◽  
Vitamin D Supplementation ◽  
Before And After

AbstractObservational and experimental data reinforce the concept that vitamin D is associated with the pathogenesis of arterial hypertension. We investigated the effect of a single dose of 100,000 IU of cholecalciferol, in office blood pressure (BP), and 24-h ambulatory blood pressure monitoring (ABPM) in patients with type 2 diabetes mellitus (DM), hypertension, and hypovitaminosis D. Forty-three patients were randomized to a placebo or cholecalciferol group. BP was assessed by office measurements and 24-h ABPM, before and after intervention. At week 8, a greater decrease in median ABPM values was observed in cholecalciferol supplementation than in the placebo group for systolic 24-h (− 7.5 vs. − 1; P = 0.02), systolic daytime (− 7 vs. − 1; P = 0.007), systolic nighttime (− 7.0 vs. 3; P = 0.009), diastolic 24-h (− 3.5 vs. − 1; P = 0.037), and daytime DBP (− 5 vs. 0; P = 0.01). Office DBP was also reduced after vitamin D supplementation. A single dose of vitamin D3 improves BP in patients with type 2 diabetes, hypertension, and vitamin D insufficiency, regardless of vitamin D normalization. Vitamin D supplementation could be a valuable tool to treat patients with type 2 DM, hypertension, and hypovitaminosis D.Trial registration: Clinicaltrials.gov NCT 02204527.

scholarly journals High-Dose Vitamin D Supplementation Improves Microcirculation and Reduces Inflammation in Diabetic Neuropathy Patients

Nutrients ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2518 ◽  
Author(s):  
Tatiana Karonova ◽  
Anna Stepanova ◽  
Anna Bystrova ◽  
Edward B. Jude
Keyword(s):  
Vitamin D ◽  
Peripheral Neuropathy ◽  
Inflammatory Markers ◽  
Signs And Symptoms ◽  
Vitamin D Supplementation ◽  
High Dose ◽  
Treatment Groups ◽  
Cutaneous Microcirculation ◽  
Before And After ◽  
Cholecalciferol Supplementation

We assessed the effect of different doses of vitamin D supplementation on microcirculation, signs and symptoms of peripheral neuropathy and inflammatory markers in patients with type 2 diabetes (T2DM). Sixty-seven patients with T2DM and peripheral neuropathy (34 females) were randomized into two treatment groups: Cholecalciferol 5000 IU and 40,000 IU once/week orally for 24 weeks. Severity of neuropathy (NSS, NDS scores, visual analogue scale), cutaneous microcirculation (MC) parameters and inflammatory markers (ILs, CRP, TNFα) were assessed before and after treatment. Vitamin D deficiency/insufficiency was detected in 78% of the 62 completed subjects. Following treatment with cholecalciferol 40,000 IU/week, a significant decrease in neuropathy severity (NSS, p = 0.001; NDS, p = 0.001; VAS, p = 0.001) and improvement of cutaneous MC were observed (p < 0.05). Also, we found a decrease in IL-6 level (2.5 pg/mL vs. 0.6 pg/mL, p < 0.001) and an increase in IL-10 level (2.5 pg/mL vs. 4.5 pg/mL, p < 0.001) after 24 weeks of vitamin D supplementation in this group. No changes were detected in the cholecalciferol 5000 IU/week group. High-dose cholecalciferol supplementation of 40,000 IU/week for 24 weeks was associated with improvement in clinical manifestation, cutaneous microcirculation and inflammatory markers in patients with T2DM and peripheral neuropathy.

VITAMIN D SUPPLEMENTATION IN FEMALE NURSES: THE EFFECTS ON SERUM 25-HYDROXYVITAMIN D, AND NON-SPECIFIC MUSCULOSKELETAL PAIN

2015 ◽  
Vol 18 (02) ◽  
pp. 1550008 ◽  
Author(s):  
Negin Masoudi Alavi ◽  
Mahla Madani ◽  
Mohsen Taghizadeh ◽  
Mohammad Reza Sharif
Keyword(s):  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Musculoskeletal Pain ◽  
Vitamin D Supplementation ◽  
High Dose ◽  
Single High Dose ◽  
Hydroxyvitamin D ◽  
Before And After ◽  
25 Hydroxyvitamin D ◽  
Female Nurses

Purpose: To investigate the effect of weekly single high dose vitamin D supplementation on serum 25-hydroxyvitamin D [25(OH)D], and non-specific musculoskeletal pain in female nurses. Methods: In this prospective study in Kashan/Iran, from April 1, 2014, through September 30, 2014, the 150 nurses with vitamin D deficiency received the weekly pearls of 50,000 units of vitamin D3 for 10 weeks. The serum level of 25(OH)D was measured before and after supplement therapy. The subjects were also asked to complete the Extended Nordic Musculoskeletal Questionnaire. All analyses were conducted with SPSS version 16. Results: After 10 weeks of intervention there was [Formula: see text][Formula: see text]ng/mL increase in 25(OH)D. The 82 nurses (54.7%) had 25(OH)D in normal range, while the 68 nurses (45.3%) were still vitamin D deficient. Weight could explain 15.4% increase in 25(OH)D. Before intervention 135 (90%), of nurses reported musculoskeletal pain in at least one region, after intervention this number decreased to 72.7%. There was a statistically significant improvement in musculoskeletal pain in neck, shoulders, upper back, lower back, hips/tights, knees, and ankles/feet after intervention. Conclusions: The weekly single high dose of vitamin D for 10 weeks could resolve vitamin D deficiency in about half of the patients. Patients with non-specific musculoskeletal pain might benefit from vitamin D supplementation.

scholarly journals High-dose vitamin D supplementation in multiple sclerosis – results from the randomized EVIDIMS (efficacy of vitamin D supplementation in multiple sclerosis) trial

2020 ◽  
Vol 6 (1) ◽  
pp. 205521732090347 ◽  
Author(s):  
Jan Dörr ◽  
Priscilla Bäcker-Koduah ◽  
Klaus-Dieter Wernecke ◽  
Elke Becker ◽  
Frank Hoffmann ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Vitamin D ◽  
Disease Activity ◽  
Sample Size ◽  
Pilot Trial ◽  
Vitamin D Supplementation ◽  
High Dose ◽  
Clinical Relapse ◽  
Lesion Development ◽  
Cholecalciferol Supplementation

Background Epidemiological, preclinical, and non-interventional studies link vitamin D (VD) serum levels and disease activity in multiple sclerosis (MS). It is unclear whether high-dose VD supplementation can be used as an intervention to reduce disease activity. Objectives The study aimed to compare the effects of every other day high- (20,400 IU) versus low-dose (400 IU) cholecalciferol supplementation on clinical and imaging markers of disease activity in patients with relapsing–remitting MS or clinically isolated syndrome. Methods The EVIDIMS (efficacy of vitamin D supplementation in multiple sclerosis) trial was a multicentre randomized/stratified actively controlled explorative phase 2a pilot trial with a double-blind intervention period of 18 months, add on to interferon-β1b. Results Fifty-three patients were randomized, and 41 patients completed the study. Cholecalciferol supplementation was well tolerated and safe in both arms. After 18 months, clinical (relapse rates, disability progression) and radiographical (T2-weighted lesion development, contrast-enhancing lesion development, brain atrophy) did not differ between both treatment arms. Post-study power calculations suggested that the sample size was too low to prove the hypothesis. Conclusions The results neither support nor disprove a therapeutic benefit of high-dose VD supplementation but provide a basis for sound sample size estimations in future confirmatory studies. www.clinicaltrials.gov/NCT01440062

scholarly journals Short term, high-dose vitamin D supplementation for COVID-19 disease: a randomised, placebo-controlled, study (SHADE study)

2020 ◽  
pp. postgradmedj-2020-139065 ◽  
Author(s):  
Ashu Rastogi ◽  
Anil Bhansali ◽  
Niranjan Khare ◽  
Vikas Suri ◽  
Narayana Yaddanapudi ◽  
...  
Keyword(s):  
Vitamin D ◽  
Inflammatory Markers ◽  
Intervention Group ◽  
Vitamin D Supplementation ◽  
Controlled Study ◽  
Control Group ◽  
High Dose ◽  
Baseline Serum ◽  
Cholecalciferol Supplementation ◽  
And Control

BackgroundVitamin D has an immunomodulatory role but the effect of therapeutic vitamin D supplementation in SARS-CoV-2 infection is not known.AimEffect of high dose, oral cholecalciferol supplementation on SARS-CoV-2 viral clearance.DesignRandomised, placebo-controlled.ParticipantsAsymptomatic or mildly symptomatic SARS-CoV-2 RNA positive vitamin D deficient (25(OH)D<20 ng/ml) individuals.InterventionParticipants were randomised to receive daily 60 000 IU of cholecalciferol (oral nano-liquid droplets) for 7 days with therapeutic target 25(OH)D>50 ng/ml (intervention group) or placebo (control group). Patients requiring invasive ventilation or with significant comorbidities were excluded. 25(OH)D levels were assessed at day 7, and cholecalciferol supplementation was continued for those with 25(OH)D <50 ng/ml in the intervention arm. SARS-CoV-2 RNA and inflammatory markers fibrinogen, D-dimer, procalcitonin and (CRP), ferritin were measured periodically.Outcome measureProportion of patients with SARS-CoV-2 RNA negative before day-21 and change in inflammatory markers.ResultsForty SARS-CoV-2 RNA positive individuals were randomised to intervention (n=16) or control (n=24) group. Baseline serum 25(OH)D was 8.6 (7.1 to 13.1) and 9.54 (8.1 to 12.5) ng/ml (p=0.730), in the intervention and control group, respectively. 10 out of 16 patients could achieve 25(OH)D>50 ng/ml by day-7 and another two by day-14 [day-14 25(OH)D levels 51.7 (48.9 to 59.5) ng/ml and 15.2 (12.7 to 19.5) ng/ml (p<0.001) in intervention and control group, respectively]. 10 (62.5%) participants in the intervention group and 5 (20.8%) participants in the control arm (p<0.018) became SARS-CoV-2 RNA negative. Fibrinogen levels significantly decreased with cholecalciferol supplementation (intergroup difference 0.70 ng/ml; P=0.007) unlike other inflammatory biomarkers.ConclusionGreater proportion of vitamin D-deficient individuals with SARS-CoV-2 infection turned SARS-CoV-2 RNA negative with a significant decrease in fibrinogen on high-dose cholecalciferol supplementation.Trial register numberNCT04459247.

scholarly journals Vitamin D supplementation does not improve CVD risk factors in vitamin D-insufficient subjects

2018 ◽  
Vol 7 (6) ◽  
pp. 840-849 ◽  
Author(s):  
Julia Kubiak ◽  
Per Medbøe Thorsby ◽  
Elena Kamycheva ◽  
Rolf Jorde
Keyword(s):  
Risk Factors ◽  
Blood Pressure ◽  
Vitamin D ◽  
Controlled Trial ◽  
Hdl Cholesterol ◽  
Vitamin D Supplementation ◽  
High Dose ◽  
Cvd Risk Factors ◽  
Cvd Risk ◽  
Baseline Serum

Objective Low serum 25(OH)D levels are associated with cardiovascular disease (CVD) and some of its risk factors. However, in interventional studies, the effects of vitamin D supplementation have been uncertain, possibly due to inclusion of vitamin D-sufficient subjects. Our aim was therefore to examine effects of vitamin D supplementation on CVD risk factors in vitamin D-insufficient subjects. Design Double-blinded randomized controlled trial. Methods A 4-month interventional study with high-dose vitamin D (100,000 IU loading dose, followed by 20,000 IU/week) or placebo with measurements of blood pressure, lipids (total-, LDL- and HDL-cholesterol, triglycerides, apolipoproteins A1 and B), and glucose metabolism parameters (blood glucose, HbA1c, serum human receptors for advanced glycation end products (sRAGE), insulin, C-peptide and HOMA-IR). Results A total of 422 subjects with mean serum 25(OH)D level 34 nmol/L were included, with 411 subjects completing the study. Serum 25(OH)D levels increased with 56 nmol/L and decreased with 4 nmol/L in the vitamin D and placebo group, respectively. We found no statistically significant differences between the two groups in any of the measured CVD risk factors, except for a minor increase in sRAGE in the vitamin D group. Stratified analyses of subjects with low baseline serum 25(OH)D levels alone, or combined with blood pressure, lipid and HOMA-IR values above the median for the cohort, did not skew the results in favour of vitamin D supplementation. Conclusion Supplementation with vitamin D in subjects with baseline vitamin D insufficiency does not improve CVD risk factor profile.

scholarly journals Influence of Sunlight and Oral D3 Supplementation on Serum 25(OH)D Concentration and Exercise Performance in Elite Soccer Players

Nutrients ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1311
Author(s):  
Małgorzata Magdalena Michalczyk ◽  
Artur Gołaś ◽  
Adam Maszczyk ◽  
Piotr Kaczka ◽  
Adam Zając
Keyword(s):  
Vitamin D ◽  
Sun Exposure ◽  
Serum Levels ◽  
Vitamin D Supplementation ◽  
Soccer Players ◽  
Total Testosterone ◽  
High Dose ◽  
Professional Soccer ◽  
Before And After ◽  
D 12

The aim of this study was to evaluate the influence of natural sun exposure and six weeks of a high dose of vitamin D supplementation on vitamin D, testosterone and cortisol serum concentrations as well as speed, power and VO2max in professional soccer players. Materials: The study was conducted from January to September. At the beginning of the study, 33 professional soccer players were enrolled; however, only 28 subjects (height 181.5 cm; body mass 77.81 ± 8.8 kg; body fat 12.38% ± 2.4% and muscle mass 40.27 ± 5.3 kg) completed the study. The research consisted of three stages. The first one, lasting 10 days, was conducted in January during a training camp in the south part of Cyprus at a latitude of 34 33°, where participants experienced natural sun exposure; it was called a winter sun exposure (WSE) period. The second stage, which was a supplementation period (SP), lasted 6 weeks, during which all subjects were randomly assigned either to an experimental group—EG (n = 15)—or a placebo group—PG (n = 13)—and were administered 6000 IU/d cholecalciferol or a placebo, respectively. The third stage took place in September, after summertime (summer sun exposure—SSE). The data of the 25(OH)D, free and total testosterone (fT, tT), cortisol as well as 5 and 30 m sprint tests (STs), power of the left leg (PLL) and VO2max were evaluated before and after the WSE period, the SP and SSE. Results: In January, the baseline value of vitamin D in 12 subjects was ≤20 ng/mL, and 14 of them had levels between 20–30 ng/mL and 2 individuals >30 ng/mL. After the WSE period, significant changes in 25(OH)D, fT, tT and cortisol concentration, as well as in the 5 m ST, were observed. After the SP, in the EG, significant changes were found in 25(OH)D, fT, tT and the 5 m ST. Furthermore, a positive correlation between the concentration of 25(OH) fT and tT was observed. After SSE, 2 out of 28 players had <20 ng/mL 25(OH)D, 12 of them had 25(OH)D between 20 and 30 ng/mL and 14 of them had 25(OH)D between 30 and 50 ng/mL. Significant differences in 25(OH)D, fT, tT concentration and the 5 m ST performance were observed following SSE compared with the WSE period. Conclusion: Due to the serum level of 25(OH)D demonstrated by most participants at the beginning of the study and after summertime, all-year-round supplementation with high doses of vitamin D seems to be a reasonable solution to enhance high 25(OH)D concentration in blood and physical performance. In the middle of the winter, almost half of the soccer players were serum deficient of 25(OH)D. After ten days of sun exposure and 6 weeks of vitamin D supplementation, the concentration of 25(OH)D significantly increased, as did testosterone and results in the 5 m sprint test also improved. Therefore, athletes should be constantly monitored for serum levels of 25(OH)D throughout the year and should be supplemented if deficiencies or insufficient amounts of this vitamin occur.

scholarly journals Association of Vitamin D Supplementation in Cardiorespiratory Fitness and Muscle Strength in Adult Twins: A Randomized Controlled Trial

2020 ◽  
Author(s):  
Jeane Pires ◽  
Michelle Vasconcelos de Oliveira Borges ◽  
Aline Alves Soares ◽  
Elys Costa de Sousa ◽  
José Ronaldo Ribeiro da Costa ◽  
...  
Keyword(s):  
Vitamin D ◽  
Muscle Strength ◽  
Cardiorespiratory Fitness ◽  
Controlled Trial ◽  
Monozygotic Twins ◽  
Vitamin D Supplementation ◽  
Hand Grip ◽  
Before And After ◽  
Cholecalciferol Supplementation ◽  
Adult Twins

Abstract Background: Although vitamin D is related to cardiorespiratory fitness and muscle strength, there is no evidence in the literature about the genetic influence of the response to the increase in body vitamin D. Therefore, we evaluate the effect of longitudinal supplementation of vitamin D on parameters of physical fitness in monozygotic twins.Methods: In total, 74 participants were included, with a mean age of 25 years, divided into two groups, one group received supplementation with cholecalciferol for 60 days and the other group did not. Cardiorespiratory fitness and muscle strength were measured before and after supplementation, through maximal treadmill tests and dynamometry, respectively. Wilcoxon tests were used to compare intra-group results and the Mann-Whitney test to examine intergroup differences.Results: There was an increase in the serum concentration of vitamin D in participants who ingested the supplementation. Cardiorespiratory fitness improved after supplementation through increases in the values of maximum oxygen consumption of 28% (P <0.001). Muscle strength in right hand grip significantly increased in participants who received the supplement to 33.0 (P = 0.007).Conclusion: 60 days of cholecalciferol supplementation improved cardiorespiratory fitness and upper limb muscle strength.Trial registration: RBR-3qy2f2. Registered 28 March 2016, http://www.ensaiosclinicos.gov.br/rg/RBR-3qy2f2/2

scholarly journals High-dose vitamin D supplementation is associated with an improvement in several cardio-metabolic risk factors in adolescent girls: a nine-week follow-up study

2017 ◽  
Vol 55 (2) ◽  
pp. 227-235 ◽  
Author(s):  
Sayyed Saeed Khayyatzadeh ◽  
Seyed Jamal Mirmoosavi ◽  
Mostafa Fazeli ◽  
Zahra Abasalti ◽  
Amir Avan ◽  
...  
Keyword(s):  
Risk Factors ◽  
Blood Pressure ◽  
Vitamin D ◽  
Adolescent Girls ◽  
Density Lipoprotein ◽  
Vitamin D Supplementation ◽  
Metabolic Risk Factors ◽  
High Dose ◽  
Metabolic Risk ◽  
High Dose Vitamin

Background Vitamin D deficiency is a prevalent and important global health problem. Because of its role in growth and development, vitamin D status is likely to be particularly important in adolescent girls. Here, we explored the effects of high-dose vitamin D supplementation on cardio-metabolic risk factors. Methods We have examined the effects of vitamin D supplementation on cardio-metabolic risk factors in 988 healthy adolescent girls in Iran. Fasting blood samples and anthropometric measurements were obtained at baseline and after supplementation with high-dose vitamin D. All individuals took a capsule of 50,000 IU vitamin D/week for nine weeks. The study was completed by 940 participants. Results The prevalence of vitamin D deficiency was 90% at baseline, reducing to 16.3% after vitamin D supplementation. Vitamin supplementation was associated with a significant increase in serum concentrations of 25 (OH) vitamin D and calcium. There were significant reductions in diastolic blood pressure, heart rate, waist circumference and serum fasting blood glucose, total- and low-density lipoprotein-cholesterol after the nine-week period on vitamin D treatment, but no significant effects were observed on body mass index, systolic blood pressure or serum high-density lipoprotein cholesterol and triglyceride. Conclusion Vitamin D supplementation had beneficial effects on cardio-metabolic profile in adolescent girls.

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