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Vitamin D Deficiency clinical trials

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NCT ID: NCT06292195 Recruiting - Pregnancy Clinical Trials

Effects of Vitamin D on Health Promotion During Pregnancy and Its Impact on Prematurity-Related Outcome

VitDTracking
Start date: November 3, 2023
Phase:
Study type: Observational [Patient Registry]

The VitDTracking study focuses on the relevance of maternal vitamin D levels and their association with prematurity, aiming to improve maternal and child health outcomes, particularly by reducing avoidable preterm births. In Portugal, vitamin D levels during pregnancy have never been studied. Epidemiological data from other countries reveal a high prevalence of vitamin D deficiency/insufficiency, especially in pregnant women. The hypovitaminoses prevalence remains high even with a supplementation dosage of 400 to 600 IU/day during pregnancy (dosage used in Portugal), which is considered as a suboptimal dose. This phenomenon is associated with adverse maternal and child outcomes, such as intrauterine growth restriction, preeclampsia, cholestasis, hypertension, and gestational diabetes as major causes of prematurity. Additionally, the Portuguese population has a higher prevalence of genome alterations that confer a lower capacity to produce vitamin D from sunlight exposure. These genetic characteristics are present in about 19% of the population, representing a prevalence four times higher than the European average (19% versus 4.75%), leading to a higher predisposition to vitamin D deficiency.

NCT ID: NCT06203041 Recruiting - Clinical trials for Vitamin D Deficiency

Vitamin D Sulfates in Breastmilk

Start date: November 21, 2023
Phase: N/A
Study type: Interventional

Infants The purpose of this study is to measure breastmilk's vitamin D sulfate nutritional value in infant's saliva and digesta (gut). Breastfeeding Mothers The purpose of this study is to measure Vitamin D sulfates in freshly expressed breastmilk samples before and after 28 days of Vitamin D supplementation in lactating mothers.

NCT ID: NCT06138249 Recruiting - Hypovitaminosis D Clinical Trials

Cholecalciferol and Calcifediol Are Both Useful to Improve Vitamin D Serum Levels

VITD
Start date: July 1, 2023
Phase: N/A
Study type: Interventional

Patients with hypovitaminosis D are randomized into three arms of treatment: Group A: Calcifediol 0,266mg each month Group B: Cholecalciferol 25000UI each 15 days Group C: Calcifediol 4 drops per day. Serum levels of vitamin D are dosed after one month of treatment

NCT ID: NCT06067477 Recruiting - Clinical trials for Vitamin D Deficiency

Estimation of the Dietary Requirement for Vitamin D in Ethnic Groups

Start date: November 1, 2023
Phase: N/A
Study type: Interventional

The aim of this study is to perform a double-blind, randomised, dose-response trial of vitamin D3 supplementation in United Kingdom (UK)-dwelling adults of white European, South Asian, and black African/Caribbean ethnicity to investigate the distribution of dietary intakes needed to maintain adequate vitamin D status in winter, as indicated by serum 25(OH)D concentrations at ranges of >25 to 50 nmol/L. In addition, this study will investigate the effect of vitamin D3 supplementation on immune health, muscular strength, and overall health.

NCT ID: NCT05981534 Recruiting - Knee Osteoarthritis Clinical Trials

The Effectiveness of Vitamin D Supplementation in Patients With End-stage Knee Osteoarthritis

Start date: March 17, 2024
Phase: N/A
Study type: Interventional

Osteoarthritis (OA) knee is one of the commonest chronic degenerative conditions. It causes disability in elderlies due to pain and stiffness. The prevalence of radiologic knee osteoarthritis increases in proportion to age, reaching an astounding 64.1% for patients who are over 60 years of age. In 2021, there were over 26,000 patients on the Hospital Authority (HA) waiting list for knee total knee replacement (TKR) and with only 4300 TKRs performed, the nominal waiting time for TKR was almost 89 months. Low vitamin D can adversely affect cartilage thickness and study suggested that low serum vitamin D is associated with increased radiographic knee OA progression. A systematic review concluded that vitamin D supplements can improve pain and function in patients with knee OA. Vitamin D has long been recognized for its effect on musculoskeletal health and increasing attention has been focused for its effect on muscle function. Vitamin D have a direct effect on muscle hypertrophy by acting on specific vitamin D receptors (VDRs) on myocytes, and sufficient levels of vitamin D in patients have been found to correlate with an increase in the size, number, and strength of muscle fibres. Vitamin D also seems to exert beneficial effects by its interplay with myokines such as myostatin and irisin. One study also showed that muscle nuclear VDR was increased by 30% and augmented muscle fibre size by 10% in elderly females (mean age of 78 years) taking vitamin D orally at a rate of 100 µg/day (4000 IU/day) for 4 months. This will be a double-blinded RCT investigating the effect of vitamin D supplements or knee muscle strength, physical function, pain symptoms and, sarcopenia status. The study will be a follow-up study with assessment at baseline, 3- ,6-and 12-months post vitamin D intervention.

NCT ID: NCT05950204 Recruiting - Clinical trials for Vitamin d Deficiency

Effect of Supplementation With ω-3 Fatty Acids, Vitamin D and Calcium in Patients With Acute Lymphoblastic Leukemia.

Start date: September 10, 2022
Phase: N/A
Study type: Interventional

The purpose of this study is to evaluate the efficacy of supplementation with Omega 3, Vitamin D and Calcium, in a cohort of children with ALL undergoing treatment and compare changes in the concentrations of biomarkers of bone resorption (TRAP5b, CTX, and RANKL), the RANKL/OPG ratio, and biomarkers of bone formation (BALP, OC, PINP, PICP and OPG) after 6 and 12 weeks of supplementation.

NCT ID: NCT05937789 Recruiting - Critical Illness Clinical Trials

Effects of Early Vitamin D3 Supplementation on Clinical Outcomes for Critically Ill Patients

Start date: January 22, 2024
Phase: N/A
Study type: Interventional

There are no clear international guidelines for dosing vitamin D based on deficiency severity. Therefore, a new clinical trial is needed to evaluate the benefits of early vitamin D supplementation in maintaining sufficient levels for critically ill patients. The investigators conducted a multicenter clinical trial in Taiwan focusing on vitamin D and critically ill patients. 240 patients with low calcidiol levels will be enrolled and be provided varying supplementation doses to maintain their serum calcidiol levels ≥ 30 ng/mL within 30 days of ICU admission. The results will serve as a valuable reference for intensivists when formulating appropriate vitamin D treatment strategy to maximize clinical benefits for critically ill patients.

NCT ID: NCT05860270 Recruiting - Clinical trials for Vitamin D Deficiency

Oral Vitamin D Supplementation Prevent Peritoneal Dialysis-related Peritonitis

VD-PD
Start date: June 15, 2023
Phase: Phase 4
Study type: Interventional

This is a multicenter randomized, placebo-controlled trial of Vitamin D supplementation in patients on peritoneal dialysis to determine whether oral administration of vitamin D3 after curing an episode of peritonitis could reduce the risk of subsequent peritoneal dialysis-related peritonitis.

NCT ID: NCT05824897 Recruiting - Pregnancy Related Clinical Trials

The Cohort Study of the Correlation Between Serum 25(OH)D Level and Pregnancy Outcome

Start date: November 1, 2022
Phase:
Study type: Observational

The objective of this single-center prospective observational study is to clarify the trend of maternal serum 25(OH)D levels before pregnancy and during pregnancy, and to explore the correlation between serum 25(OH)D levels and subsequent pregnancy outcomes of patients with abortion, so as to provide certain scientific evidence for finding the optimal serum level of 25(OH)D and optimal vitamin D supplementation to maintain a healthy pregnancy.

NCT ID: NCT05802433 Recruiting - Clinical trials for Vitamin D Deficiency

The Genetic Effects on Vitamin D Supplementation

Start date: May 16, 2022
Phase: N/A
Study type: Interventional

Vitamin D is essential for skeletal growth and bone health, deficiency causes rickets and osteomalacia. In the UK 29% of adults have vitamin D deficiency. It is recommended all adults take 10µg vitamin D supplement daily. Genetic variations could alter vitamin D status by affecting vitamin D metabolism. Systematic reviews found variations in VDR, GC and CYP2R1 genes are associated with vitamin D deficiency. This study aims to assess the effects between vitamin D supplementation and variations in VDR, GC and CYP2R1 genes on vitamin D status.