Active clinical trials for "Vitamin D Deficiency"

Primary Objectives: To evaluate the efficacy of metformin and Vitamin D supplementation on serum insulin and serum androgen levels (Total testosterone, Steroid Hormone Binding Globulin, Free Androgen Index) levels compared metformin alone in infertile Poly cystic ovarian females of reproductive age group. Secondary Objectives: To measure change in endometrial thickness/number of follicles and follicular size by day 12 trans-vaginal ultrasound in the intervention group i.e. combination of metformin and vitamin D supplementation

To assess if vitamin D status in the elective foot and ankle fusion population affects fusion healing categorically (fused vs. un-fused).

At present, there is no clinical reference data on how much the concentration of calcifediol in the blood increases after supplementing with vitamin D for Taiwanese ICU patients. This study aims to investigate the effects of enteral supplementation of vitamin D in critically ill patients with vitamin D deficiency. The results of the study are expected to provide clinical reference data to intensivists to select adequate dosage of vitamin D supplementation for their patients with vitamin D deficiency. This is a multi-center, randomized clinical trial. ICU patients will receive vitamin D level examination. If the subject's blood calcifediol concentration is less than 20 ng / mL, the subject will be included in this clinical trial. Patients who are suitable to enteral supplement of vitamin D will be randomly divided to group Control (no vitamin D supplement) and group Vitamin D (enteral supplement of 569,600 IU vitamin D). The vitamin D level will be measures at specific time points.

This is a phase 3, multi-center, randomized, double-blind, placebo-controlled study in children with stage 3-4 chronic kidney disease (CKD), secondary hyperparathyroidism (SHPT) and vitamin D insufficiency.

This is a single site double blind randomized controlled trial of replacing Vitamin D for Vitamin D-deficient burn patients at a current recommended dose (400 IU daily) versus a higher dose (4000 IU daily). Capsules will be made in a compounding pharmacy and will look identical. Randomized controlled trial. People who meet the selection criteria will be randomized to either low or high dosage of Vitamin D. Treatment arm is high dose Vitamin D (4000 IU), and control is low dose Vitamin D (400 IU). Main outcome variables include PROMIS-29 measures of physical health, mental health and social health, the Veterans RAND 12 Item Health Survey (VR-12), and the 4-D Itch Scale. Secondary outcome variables include subject demographics, injury demographics and characteristics.

Trauma has been an important global public health issue. Yet it is the sixth cause of death in Taiwan, trauma brings great negative impact to national productivity since it presents specifically as the leading cause of death for the population aged below 40 years. According to the national databank from Formosa Association for the Surgery of Trauma, mortality rate in critically traumatic patients with injury severity score (ISS) ≥ 25 is as high as 23%. Vitamin D, a pleiotropic hormone, regulates directly functions of most organs and immune system. It has been proven that vitamin D insufficiency or deficiency would deteriorate survival of critically ill patients, while supplementation of high-dose vitamin D ameliorates the clinical outcomes. This study investigates whether multiple high doses of vitamin D supplementation in one week can decrease the mortality and morbidity in critically traumatic patients.

Study content: This is a multicentre, double-blind, randomised controlled study to determine the optimal dose and duration of treatment for the correction of vitamin D insufficiency or deficiency in patients with CKD5d; to investigate whether vitamin D supplementation delays the increase in PTH levels in this group of patients; and to investigate the effects on changes in CKD-MBD-related markers, cardiovascular complications, cognitive function in this group of patients. 2. Study procedure: Based on the inclusion and exclusion of the patients, the study was conducted in accordance with the following criteria Study procedure: Eligible subjects were screened according to inclusion and exclusion criteria and randomly divided into three groups: high-dose vitamin D group, low-dose vitamin D group and control group. Baseline data were collected before the intervention and each group was given different doses of regular vitamin D2 softgels or placebo and followed up. 25(OH)D, PTH, blood Ca, and blood P levels were measured every month; bone metabolism markers, FGF23, and blood counts, liver function, kidney function, lipids, and blood glucose were measured every 3 months; the prevalence of vascular calcification, the incidence of cardiovascular events, and changes in cognitive function scale scores were assessed 6 months after the intervention.

The increased risk of transmission of COVID-19 infection causes the incidence of death in health workers to escalate. It requires further research on risk factors and intervention in health worker professionals, especially on immunity factors and nutritional status. Quality of diet and nutrition is very important to support the immune system when infected. Several probiotic strains have been shown to decrease the duration and incidence of diarrhea and respiratory infections, suggesting the Gut-Lung Axis pathway. Some probiotics also improve the balance of diversity in the composition of the gut microbiota and affect body weight in obese people. Probiotics have also been shown to improve vitamin D absorption. A combination of vitamin D and probiotics may be an alternative to reduce gut dysbiosis that will directly or indirectly reduce the risk and severity of viral infections including SARS-CoV-2.

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.

The goal of this clinical trial is to understand the effects of oral vitamin D3 supplementation on various cardiovascular risk factors in generally healthy, young adult black women who are vitamin D deficient or insufficient at baseline. The main questions it aims to answer are: Does 8 weeks of vitamin D3 supplementation (5,000 IU per day) improve 24 hour blood pressure metrics in generally healthy, young adult black women who are vitamin D deficient or insufficient at baseline? Does 8 weeks of vitamin D3 supplementation (5,000 IU per day) improve objectively estimated sleep duration and regularity in generally healthy, young adult black women who are vitamin D deficient or insufficient at baseline? Does 8 weeks of vitamin D3 supplementation (5,000 IU per day) improve various measures of blood vessel structure and function in generally healthy, young adult black women who are vitamin D deficient or insufficient at baseline? All participants will undergo baseline testing, which includes 2 continuous weeks of objective sleep monitoring using a sleep watch, one 24-hour period of ambulatory blood pressure monitoring, and one blood vessel function testing visit. Following baseline testing, vitamin D insufficient and deficient participants will be prescribed take 5,000 IU of vitamin D3 daily for 8 continuous weeks. Participants will undergo 2-weeks of sleep monitoring again during weeks 3-4 of the supplementation period and during weeks 7-8 of the supplementation period. Additionally, 24-hour blood pressure monitoring will be performed during week 4 and week 8, and blood vessel function testing will take place at the end of week 4 and again at the end of week 8. Researchers will assess the effect of the vitamin D3 supplementation intervention by comparing all values between baseline, week 4, and week 8 to see if there is any effect of vitamin D3 supplementation on 24-hour blood pressure, sleep duration and regularity, and blood vessel structure and function following 4 and 8 weeks of supplementation.