View clinical trials related to Vitamin D Deficiency.
Filter by:Vitamin D deficiency (low levels of vitamin D in the blood) is a common problem. A recently discovered protein, called hCAP18, likely plays an important role in the immune system and may depend on adequate levels of vitamin D. It is not known what levels of vitamin D are needed to allow the body to make this protein. Nor is it known if giving vitamin D to people who are found to be deficient will help boost levels of hCAP18. This study aims to clarify the relationship between vitamin D levels and hCAP18.
In recent years, vitamin D has been shown not only to be important for bone and calcium metabolism but also for homeostasis of critical tissues involved in vascular disease in patients with diabetes. Epidemiological studies indicated the high prevalence of vitamin D deficiency among Type 2 DM patients and suggest an increased risk of cardiovascular disease and hypertension with low vitamin D levels. The objective of this proposal is to evaluate the effects of vitamin D replacement on blood pressure control and vascular disease in vitamin D deficient hypertensive patients with diabetes
The purpose of this study is to examine whether oral vitamin D supplementation in people with inadequate vitamin D concentrations will lower LDL-cholesterol and total cholesterol concentrations.
Vitamin D deficiency is widespread and linked to decreased bone mineral content. Little data exists regarding the vitamin D status and the relationship of 25-hydroxyvitamin D (25-OHD) status to functional bone health outcomes in Hispanic infants. To evaluate this, we plan an observational cohort of full term, healthy, exclusively breastfed Hispanic and Caucasian infants. We hypothesize serum 25-OHD measured in cord blood will be significantly lower in Hispanic than Caucasian infants, with 25-OHD less than 20 ng/mL found in at least 50% of Hispanic neonates. Secondary aims evaluate the relationship between 25-OHD levels and bone mineral status at baseline and after 3 months of 400 IU/day supplemental vitamin D3. Whole body bone density scan (DXA) and bone ultrasound (SOS U/S) will be measured shortly after birth, then again after supplementation. Data from this study will provide information needed to design further randomized trials and interventions.
The purpose of the study is to describe vitamin D status among patients with type 2 diabetes and to determine the association between serum 25-hydroxyvitamin D and glycemic control, markers of inflammation and blood pressure
Vitamin D is available in two forms, vitamin D2 and vitamin D3. It has previously been assumed that these two forms maintain blood vitamin D equally. However, this may not be the case. This study will evaluate whether D2 and D3 produce equal elevation of blood vitamin D. Additionally, it will evaluate whether once per month vitamin D dosing is as effective in maintaining blood vitamin D levels as daily dosing.
The purpose of the research is to describe vitamin D levels and bone status in a rural Wisconsin population. It is probable that individuals of varying age and ethnicity require different amounts of D to achieve optimal status. These likely scenarios will be explored in various populations. We hypothesize that the increase in serum 25(OH)D resulting from daily D3 ingestion is less pronounced with advancing age and different in Native than Caucasian Americans. In addition, the women in the middle age group, between the ages of 55 and 65, will have ultrasound tests completed to assess the impact of the Vitamin D supplementation on cardiovascular health.
The main aim of the research question to test the primary hypothesis of this study, namely, Does 12 weeks of an additional 5000 IU daily of cholecalciferol increase serum 25OHD levels in adults with Cystic Fibrosis (CF) who have vitamin D deficiency relative to placebo?
Hypovitaminosis D is common in Asian Indians despite plenty of sunshine and relates to their skin pigmentation and poor sunshine exposure. Serum 25(OH)D levels are <20 ng /ml in up to 90% of them and therefore, based on the modern cut off, majority of apparently healthy normal Asian Indians would be classified as vitamin D deficient. Though, several investigators have highlighted the paradox of hypovitaminosis D in sunny Indian environment, there are only limited studies which have assessed its functional significance. To date, the significance of low serum 25(OH)D in them have been analyzed in terms of its inverse relationship with serum parathyroid hormone levels and variable association with reduced bone mineral content at hip and spine on DXA. Recently we have shown impairment in the absorption of intestinal calcium in 25(OH)D and its reversal after eight weeks of cholecalciferol supplementation. Present study is being taken to further understand the functional significance of 25(OH)D in terms of its effect on Skeletal muscle strength including its energy metabolism, bone mineral homeostasis and Th1/Th2 cytokines expression in Asian Indians with chronic biochemical hypovitaminosis D
This study will evaluate the safety over 6 months of two different doses of vitamin D (cholecalciferol) in men and women age 65 and older. It will also evaluate if supplementation with vitamin D improves physical performance.