Active clinical trials for "Vitamin D Deficiency"

Vitamin D is an essential nutrient. Deficiency of vitamin D is widespread. The prevalence of vitamin D deficiency in early preterm infants is unknown. The American Academy of Pediatrics recommends a daily intake of 400 IU in order to achieve a serum concentration of 20 ng/ml of vitamin D. This recommendation presumes exposure to sunlight, the best source of vitamin D. This study assesses vitamin D status at birth and during hospital stay in infants delivered delivered at earlier than or at 32 weeks gestation. We also assess the adequacy of intake relative to the target set by the American Academy of Pediatrics for children.

This is an analysis of de-identified data collected from 240 Saudi Arabian women, 120 with breast cancer and 120 control women, to evalyate if vitamin D status is associated with breast cancer risk.

To obtain up-to-date data on nutrient intakes in adults, a national dietary survey - the EU Menu study will be conducted during 12 consecutive months in 2017/2018, providing data on the consumption of foods and enabling the assessment of energy and macronutrient intakes. Participating subjects will be invited to NUTRIHEALTH study for assessment for micronutrient status (focusing into vitamin D, folic acid, vitamin B12, and iron) and medical examination, in which thyroid size will be aslo measured, to investigated thyroid epidemiology in Slovenia.

GraviD is a multi-ethnic population-based pregnancy cohort. Pregnant women were invited to participate in the GraviD study when registering for antenatal care in parts of the region of Västra Götaland in Sweden in 2013-2014. All women registering for antenatal care were eligible for inclusion, as long as the pregnancy had not exceeded 16 gestational weeks. In total, 2125 pregnant women were recruited in gestational week 12 during two time-periods; fall 2013 and spring 2014. Blood sampling was performed in gestational week <17 and again at gestational week >31 by midwifes. After delivery, the maternity records were obtained, to collect information on child's gender, birth weight and length and other possible birth outcomes.

Sub-clinical vitamin D deficiency is a commonly unrecognized disorder in obese adolescents. The investigators hypothesize vitamin D deficiency will be highly prevalent in obese adolescents and those who are vitamin D deficient will be more insulin resistant.

In our study; we aim to analyze the correlation between pre-treatment serum vitamin D (VD) levels and breast cancer prognostic features in newly diagnosed breast cancer patients presenting to our department.

The purpose of this study will be to investigate if there is a correlation between Vitamin D levels and Sperm DNA Fragmentation. This is a prospective, cohort study. In this study male participants presenting with their partners because of inability to conceive will be recruited for this study. Participants will have a blood sample drawn which will be tested for Vitamin D level. The investigators will then compare sperm DNA fragmentation between normal Vitamin D levels, Vitamin D insufficiency, and Vitamin D deficiency. All infertile males who present to the investigators' infertility clinic have a Semen analysis and Sperm chromatin Structure Assay (SCSA). The research part of the study will be to obtain the Vitamin D level.

Vitamin D has been promoted to vascular regeneration in non-cerebral arteries because of its anti-inflammatory properties. Cerebral vasospasm (CVS) as the most feared complication after subarachnoid hemorrhage (SAH), correlated with higher mortality and poor outcome, is the result of a multifactorial mechanism with inflammation as one of the main role players. The investigators therefore hypothesized that vitamin D attenuates cerebral vasospasm and increases the chance for favorable outcome after SAH.

Vitamin D deficiency remains a global public health issue (Wilson 2017). In the United Kingdom (UK). There is a lack of research looking at vitamin D status of the British African-Caribbean population. This population is particularly at risk to vitamin D deficiency due to possessing a skin type which hinders the production of vitamin D in the skin. Further, due to the geographical location of the UK, there is reduced ability to produce vitamin D due to the low sun exposure (Libon 2013 ). Our main source of vitamin D is through skin exposure to the sun. In the UK, the UV radiation is only strong enough in April-September (Wilson 2017) for the production of vitamin D to occur. In winter months, vitamin D needs to be consumed in food or supplement form. Vitamin D is essential for healthy bones and is associated with reduced risk of certain cancers and immune disorders (Wilson 2017). There is strong epidemiological evidence linking low vitamin D status with diabetes, cardiovascular disease, osteoporosis, osteoarthritis and some cancers (NatCen 2018). This observational study will aim to determine the vitamin D status of British Afro-Caribbean women, as well as determine the effects of sun exposure, dietary vitamin D intake, muscular strength, lifestyle and anthropometrical (height, weight etc.) factors have on vitamin D status. The study will be conducted at the University of Surrey. The study will take place in Autumn and winter 2019/2020 and a repeat study in Spring 2020. Each participant will require two visits to the university, each session will take approximately 2 hours. The study is funded by the University of Surrey. The findings of this study may lead to strategies for improving vitamin D status in this population, as well as improving guidelines to assist darker-skinned people regarding sunlight exposure in high latitudes.

Coccygodynia is a painful clinical picture of the sacrococcygeal region.Pain in coccygodynia may be somatic, neuropathic or mixed. There are many studies that emphasize the relationship between vitamin D deficiency and pain.In this study, it is aimed to investigate the severity and type of pain, as well as the effect of vitamin D level on pain in patients with coccygodynia