View clinical trials related to Vitamin D Deficiency.
Filter by:Irritable bowel syndrome (IBS) is a very common functional gastrointestinal disorder affecting nearly 20% of the North American population. IBS is characterized by chronic abdominal, associated with a change in bowel frequency and or consistency that lack a known structural or anatomic explanation. Current treatment for IBS is primarily symptom-based. However over a third of patients with IBS fail to respond to currently available therapies. The prevalence of vitamin D deficiency/insufficiency is estimated in over a billion people world-wide . Vitamin D has potential mechanisms not only in the balance of calcium and bone homeostasis, but also a key modulator of the immune system. Vitamin D receptors (VDRs) are located on all nucleated cells including the GI tract. Thus far, there is already accumulating evidence for a role for vitamin D supplementation in inflammatory bowel disease (IBD). A recent systematic review suggested there may be benefits of vitamin D supplementation in IBD. Vitamin D insufficiency is widespread in patients with IBS and there is a positive association between vitamin D status and quality of life. To date, there is no US trial examining the effect of vitamin d supplementation on IBS symptoms and quality of life in patients with IBS.
The purpose of this study is to test the efficacy and safety of high dose vitamin D therapy among HSCT patients in a tiered, step-wise manner (step one/two) in order to define treatment doses capable of providing vitamin D sufficiency.
The purpose of the research study is to determine whether a single high dose of vitamin D is helpful in reducing critical illness related complications in intensive care patients who are having sever vitamin D deficiency. Vitamin D deficiency is quite common in critically ill patients ranging from 81.5% to 99%. A number of scientific studies have documented a strong correlation between low levels of vit.D and increased rate of adverse outcomes including infection, acute kidney injury and mortality in ICU patients. A recent randomized controlled trial (RCT) has demonstrated a 50% reduction in hospital mortality in severe vit.D deficient patients following a single high dose of cholecalciferol (Vitamin D3). However, the role of Vit.D supplementation to boost up host immune system and eventually reduction of mortality has yet to be determined by large randomized controlled trials in humans. Hence the study aims to run a randomized controlled trial (RCT) in order to study the role of Vitamin D in critically ill patients.
One in four infants are born with low amounts of vitamin D stored in their body. This study is designed to test whether improving vitamin D status quickly after birth helps infants to build muscle and to normalize growth. This is important since the investigators have noticed in previous work that infants with low vitamin D have higher body weight relative to body length later on and that those who develop very good stores quickly have a leaner body type. Therefore, in this study infants with low stores early after birth will be given either the regular amount of supplementation or a higher amount to more rapidly build up the vitamin stores in the body. Infants in both groups will be measured for muscle and fat mass at standardized ages during the first year of life and into the toddler years. The information will inform health care professionals and parents of the importance of establishing good vitamin D stores early in life. Vitamin D supplementation is a modifiable factor that is already recommended for all term born infants. Knowing how much is needed in infants born with low stores has not been tested in a controlled manner in Canada.
Vitamin D insufficiency is an increasing trend in the United States. According to the NHANES data collection there was a near doubling of patients with vitamin D deficiency in 10 years. Vitamin D deficiency is associated with several adverse outcomes such as increased fractures, certain microbial diseases, cardiovascular diseases, and metabolic dysfunction. The increasing prevalence of vitamin D deficiency has been attributed to the increasing prevalence of obesity. Several studies have shown that obese patients have lower 25-OH vitamin D (25-OHD) levels compared to nonobese patients and obese patients require more vitamin D compared to nonobese patients. The most commonly prescribed medication to replete vitamin D deficiency is oral ergocalciferol. To date, no prospective trials have been published to evaluate a standard protocol in the treatment of vitamin D insufficiency in adults.
Background: Ageing is associated with an increased risk of cognitive decline and depression. Vitamin D plays an important role in many of the symptoms and conditions related to advanced age, including impaired balance, falls and osteoporosis. Vitamin D also has a physiological effect on the function of the central nervous system, and studies have suggested a relationship between this vitamin and changes in affect and cognitive function in the elderly. The investigators propose a pilot study to examine the relationship between below-normal levels of Vitamin D to affective symptoms and specific cognitive functions in the elderly. Methods: A total of 30 subjects of both genders older than 65 years with levels of 25-OH Vitamin D lower than 30 ng/ml on routine laboratory screening will be referred by the treating family physicianfor screening. Subjects will be required to provide written informed consent for inclusion in the study. Exclusion criteria will include any active or unstable medical condition as determined by the treating physician, known neurocognitive disorder, known affective disorder, the use of any class of antidepressant drugs, the use of supplements containing vitamin D in any dose, significant visual or hearing impairment not corrected by spectacles or hearing aids, and a level of literacy that limits cognitive ability. All subjects will undergo cognitive screening by use of the MoCA test, computerized cognitive assessment using the the Neurotrax (®Mindstreams) computerised cognitive assessment battery, and the 15-item Geriatric Depression Scale. All subjects will undergo repeat testing for level of 25-OH Vitamin D, and where below-normal levels are confirmed patients will receive a supplemental monthly oral dose of 60000 units Vitamin D administered by a nurse for a period of 3 months. At 3 months subjects will undergo repeat testing for level of 25-OH Vitamin D, and repeat computerized cognitive assessment using the Neurotrax Mindstreams battery and the 15-item Geriatric Depression Scale (GDS).
VISTA is looking to see if vitamin D supplements before bariatric surgery might improve vitamin D stores, which may help to prevent some complications like infections. Who can join this research study? - Approved to undergo bariatric surgery—Roux-en-Y Gastric Bypass or Vertical Sleeve Gastrectomy—at the Johns Hopkins Bayview Medical Center - 18 to 64 years of age - BMI of 35 to 49.9 kg/m2 - VitD insufficient or deficient prior to having surgery What will happen if a participant chooses to participate in this research study? - The participant will be randomly assigned (by chance) to receive either: - Standard care plus vitamin D supplements or - Standard care plus a placebo (contains no vitamin D) - Either would be provided at no cost to the participant - The investigators will ask the participant to complete a survey on the day of surgery regarding supplement use - The investigators will follow the participants medical record through the 12 month follow up clinic visit.
Crohn's disease is more common in areas of the world with less sunlight exposure. Sunlight is a major source of vitamin D. There is some research to suggest that patient's with higher vitamin D levels are less likely to undergo surgeries and have better control of their disease. We intend to study the effects of high dose vitamin D supplementation in patients with vitamin D deficiency and Crohn's disease. We hypothesize that patients given high doses will have less hospitalizations, surgeries, steroid use.
Vitamin D supplements might substantially reduce the risk of falls, potentially by more than 25%. The proposed study is a clinical trial that will determine the effects of 4 doses of vitamin D (200 International Units [IU]/day, 1000 IU/day, 2000 IU/d and 4000 IU/d) as a means to prevent falls in high-risk adults, ages 70 and older. Results of this trial will be directly relevant to public health and clinical guidelines, and will immediately influence policy.
The main objective is to assess the variation in plasma levels of cathelicidin before and after influenza vaccination. All bibliographic data suggests that supplementation vitamin D in the elderly often deficient in this vitamin may have a double interest: - By induction of cathelicidin, assist in anti-infective response in particular to the influenza virus - The normalization of vitamin D status, promote the return to an appropriate immune response limiting excess inflammation and improving capacity to respond. The entire project will collect new information on the merits of the use of vitamin D in aging. A better knowledge of mechanisms involved and the impact of aging on them is a necessary prerequisite the definition of a new strategy using this drug in the elderly particularly fragile in order to improve its autonomy. This definition seems a sociological interest obvious economic knowing the current aging population and its impact future of our health system.