View clinical trials related to Vitamin D Deficiency.
Filter by:The main objective of this placebo-controlled randomized double-blinded study is to investigate the effect of vitamin D supplementation on vitamin D status (25(OH)D concentration in the blood) among individuals with a chronic spinal cord injury (SCI). Further, the effects of vitamin D supplementation on several other parameters (e.g. bone density and mood) are investigated, which could reveal positive secondary effects of supplementation that are especially relevant for clinical practice.
Large population cross sectional study, was conducted between 2018-2020 by attendance of 4526 patients in shiraz, Iran. Patients were undergone selective coronary angiography from radial artery approach by an expert interventional cardiologist. 25-hydroxy vitamin D and Hs-CRP levels were measured for all patients
Evaluation of 25- Hydroxyvitamin D levels in pregnant women in Austria and potential related disorders Hypothesis: Austrian pregnant women are Vitamin D deficient Present vitamin D supplementation in pregnancy is insufficient Vitamin D deficiency is associated with pregnancy related disorders like preeclampsia
It is known that vitamin D has been found to decrease incidence of viral respiratory infections, as well as have effects on multiple cytokines involved in immunomodulation and the bradykinin/renin-angiotensin system. Recently, data was released showing a correlation between baseline vitamin D deficiency status and increased risk of contracting COVID-19. Separate analysis shows that many of the deleterious effects of COVID-19 may be due to the bradykinin/RAS system, and that vitamin D is one plausible treatment option to modulate these effects. Studies are currently ongoing to determine if vitamin D supplementation of those hospitalized with COVID-19 has a beneficial effect on patient outcomes. Healthcare resources have been strained during the pandemic in areas of heavy caseload. It is possible that those with concurrent vitamin D deficiency and COVID positivity have an increased need for escalation of care. A small study has been conducted in this area, but was limited by small number of subjects.
Veterans between the ages of 50-75, who are having a prostate biopsy, will be recruited for their permission to collect an extra biopsy core for RNA-sequencing. If the participants' treatment decision is Active Surveillance, they will be enrolled into the intervention phase of the study. They will receive supplementation with Vitamin D3 (4,000 IU) daily with repeat (surveillance) prostate biopsy one year later. At that time an extra prostate sample core will be collected for RNA-sequencing to determine changes over time. Measurements for allostatic load (body stress/inflammatory markers) will also be collected at the time of enrollment and at the repeat prostate biopsy visit.
Background: It remains uncertain whether vitD3 supplementation is beneficial for remission of Crohn's disease (CD). The influence of vitD3 supplementation on Infliximab (IFX) efficacy was retrospectively analyzed in Chinese CD patients. Methods: Patients with moderate-to-severe CD, who were bio-naïve and prescribed with IFX treatment for at least 54 weeks were recorded. VitD3 supplementation was defined as patients additionally took oral vitD3 (125 IU/d) within 3 days after the first infusion and persisted in the whole follow-up period. Disease activity was assessed using Harvey-Bradshaw Index (HBI). Serum cytokine profiles were quantitatively analyzed in a subset of all patients at baseline and 54-week after intervention.
The purpose of this project is to demonstrate the capability of a standing phototherapy kiosk (SPK) to stimulate cutaneous vitamin D3 and subsequent production of 25 Hydroxyvitamin (OH) D safely and as efficiently as an oral vitamin D3 supplement of 600 IU taken daily over a 10 week intervention period. We will conduct a randomized controlled trial with two treatment arms; ~120 volunteers will be assigned to either the SPK or to a 600 IU daily oral vitamin D3 supplement for 10 weeks. The SPK is an innovative, networked, self-care technology that stimulates endogenous vitamin D production with two ~2-minute treatments per month. It will be tested in an ambulatory setting where enrolled/assigned participants of various baseline levels of 25(OH)D will present for a treatment dose, based on Fitzpatrick skin type category, every other week for 10 weeks. The SPK does not produce a cosmetic tan or dispense pills.
The world is currently facing a pandemic with the coronavirus (SARS-CoV-2) which leads to the disease of COVID-19. Risk factors for a poor outcome of COVID-19 have so far been identified as older age and co-morbidity including chronic respiratory conditions such as chronic obstructive pulmonary disease (COPD) and current smoking status. Previous studies found, that vitamin D deficiency is more prevalent among patients with these risk factors. There are observational studies reporting independent associations between low serum concentrations of 25-hydroxyvitamin D (the major circulating vitamin D metabolite) and susceptibility to acute respiratory tract infection. Vitamin D substitution in patients with COVID-19 who show a vitamin D deficiency should therefore be investigated for efficacy and safety. The study is designed as a randomized, placebo-controlled, double blind study. The objective of the study is to test the hypothesis that patients with vitamin D deficiency suffering from COVID-19 treated under standardized conditions in hospital will recover faster when additionally treated with a single high dose of vitamin D compared to standard treatment only.
Objectives: The investigators conducted a prospective study in Belgium with the objective to determine the proportion of subjects identified at moderate-to-high risk for AMD, based on the STARS® questionnaire, in need of nutritional supplementation by assessing their vitamin D, zinc oxide and fatty acid profile status. Methods: This multicentre epidemiological intervention pilot study involved 50 Belgian subjects with no AMD or early AMD, aged over 55, at moderate-to-high risk for AMD based on a simplified AMD risk assessment scale (STARS®) score ≥ 10, not taking vitamin D or trace nutrient containing supplements. Outcome data was collected during a one-time subject interview comprising of clinical eye examinations (typically visual acuity), the STARS® questionnaire, visual acuity assessment, an OCT scan on the macula, and fundus photography. Blood samples were collected from the patients and serum analysis was performed to determine the levels of omega-6 to omega-3 ratio, EPA and DHA, zinc and cupric oxide, and vitamin D, recognised as key nutrients involved in AMD pathophysiology.
Treatment: A: Slower Loading Group (SLD): 30.000 IU cholecalciferol once weekly for ten weeks, followed by 30.000 IU cholecalciferol every two weeks for four weeks. B: Moderate Loading Dose group (MLD): 30.000 IU cholecalciferol twice weekly for five weeks, followed by 30.000 IU cholecalciferol every two weeks for four weeks. Every patients will receive calcium-citrate supplementation if average daily calcium intake does not reach the recommended daily amount. Setting: two-arms, controlled, randomised, comparative open-label, multicentric clinical trial aimed to assess the comparative efficacy on 25(OH)D elevation and on safety of the two loading dose schedules of 30.000 IU Vitamin D3 oral tablets (administered as "Moderate Loading Dose"or "Slower Loading Dose") combined with an follow-up maintenance period of biweekly administration. The comparative assessment is based on the elevation of 25(OH)D levels due to treatment efficacy from baseline and by the end of the maintenance (biweekly 30.000 IU) period for each treatment groups, and also the ratio of patients in target range (30-50 ng/ml) in order to evaluate the most beneficial "loading dose" schedule. Upon the serum 25(OH)D levels are exceeded the 55ng/ml limits by the end of the loading period the trial subjects should continue with the standard maintenance dose of vitamin D3 for the remaining four weeks of the study. The evaluation of the comparative safety will be done also by controlling the serum and the urinary calcium levels and the registration of adverse drug reaction. The primary objective is to assess the efficacy of the orally administered loading dose schedules of vitamin D3 in deficient patients. Efficacy is measured as the elevation of 25(OH)D levels compared to baseline. Rationale: Oral vitamin D3 is the treatment of choice in vitamin D deficiency. The UK NOS guideline recommended where rapid correction of vitamin D deficiency is required, such as in patients with symptomatic disease or about to start treatment with a potent antiresorptive agent, the recommended treatment regimen is based on fixed loading doses followed by regular maintenance therapy. The loading dose regimen to provide a total of approximately 300,000 IU vitamin D, given either as separate weekly or daily doses over 6 to 10 weeks followed by a maintenance therapy comprising vitamin D in doses equivalent to 800-2000 IU daily in general or up to 4,000 IU daily), given either daily or intermittently at higher doses. (NOS guidelines 2014). Recent research on vitamin D and the widening range of therapeutic applications available for cholecalciferol, which can be classified as both a vitamin and a pro-hormone. Additionally, it was now realized that the Food and Nutrition Board's previously defined Upper Limit (UL) for safe intake at 2,000 IU/day was set far too low and that the physiologic requirement for vitamin D in adults may be as high as 5,000 IU/day, which is less than half of the >10,000 IU that can be produced endogenously with full-body sun exposure. In a recent study showed that the safety of doses over 2000 IU/day-4000 IU/day for 3 months resulting in a ~360,000 UI cumulative dose. According to the study results, for the majority of the patients the 4000 IU/day (360,000 UI cumulative dose) was needed to achieve a 25(OH)D serum concentration above 75nmol/L (30 ng/mL), which is otherwise set as the target value by Endocrine Society Clinical Practice Guideline (Holick 2011b). Another study (Verussio et al 2014) cited shows the safety and efficacy of 50.000 IU/week for 8 weeks (400,000 UI cumulative dose for 8 weeks), followed by 25,000 IU twice a month which was more effective in raising the 25(OH)D level to the target range (of >30 ng/L) than 25,000 IU twice a month (50,000 IU/ month). In the latter group only 40% of the patients reached the target 25(OH)D levels at 6 months, compared to the 72% in the first group. The study supports efficacy of dosing and safety of the treatment of vitamin D deficiency a 50,000 IU /week loading dose scheme with a 8 weeks cumulative dose of >400,000 UI.