Clinical trials: Vitamin D Deficiency/Insufficiency
Vitamin D Insufficiency, Vitamin D Deficiency
Vitamin D Inadequacy in Rural Populations, Evaluation of Correction by Food Supplementation
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.
- Trial name
- NCT00690417
- Testing
- Cholecalciferol (vitamin D3)
- Where
- United States
- Volunteers
- 108 people, healthy volunteers welcome
- Sponsor
- University of Wisconsin, Madison
Vitamin D2 Supplementation in Vitamin D Insufficiency
Optimal Doses of Ergocalciferol Supplementation for Treatment of Hypovitaminosis D in Adults
To investigate the optimal initial and maintenance doses of vitamin D2 supplementation for the treatment of vitamin D insufficiency in Thai adults, and to determine the prevalence of and risk factors for hypovitaminosis D among…
- Trial name
- NCT03228862
- Testing
- Ergocalciferol
- Where
- Thailand
- Volunteers
- 360 people, healthy volunteers welcome
- Sponsor
- Chulalongkorn University
Hypovitaminosis D
Vitamin D Supplementation in Younger Women
That on average it will require a vitamin D dose of 1700IU/day to increase the serum 25hydroxyvitamin D level from 20 to 30ng/ml in young Caucasian women and a dose of 1860 to 2480 IU/day in African American
- Trial name
- VITADAS (NCT00662844)
- Testing
- vitamin D3
- Volunteers
- 198 people, healthy volunteers welcome
- Sponsor
- Creighton University
Nutritional Deficiency
The Use of the 25 (OH) D Saliva Test as a Substitute for the 25 (OH) D Serum Test in Healthy People
Routine examination of vitamin D levels is carried out by checking serum 25 (OH)D levels, which indicate circulating vitamin D levels.
- Trial name
- NCT04655664
- Testing
- not currently consumed vitamin D supplements regularly, consumed vitamin D supplements regularly
- Where
- Indonesia
- Volunteers
- 56 people, healthy volunteers welcome
- Sponsor
- Universitas Sumatera Utara
Vitamin D Deficiency
The Effect of Vitamin D on Bone Accretion and Turn-Over in Young Girls
Objectives To evaluate the effect of increased vitamin D intake on vitamin D status, bone mass and bone turnover in young girls aged 12-13.
- Trial name
- NCT00267540
- Testing
- cholecalciferol (D3) (vitamin)
- Where
- Denmark
- Volunteers
- 225 people, healthy volunteers welcome
- Sponsor
- University of Copenhagen
Chronic Kidney Disease (Stage 3-4), Chronic Kidney Disease Mineral and Bone Disorder
Phosphate Assessment in Chronic Kidney Disease Patients Study
The proposed pilot feeding study aims to explore novel pathways in phosphate metabolism and identify new biomarkers, as well as to develop a compound index for assessing phosphate overload with high validity and reliability.
- Trial name
- PACK (NCT07368946)
- Testing
- Dietary Phosphorus Intake
- Where
- United States
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- University of Texas Southwestern Medical Center
Chronic Renal Insufficiency, Renal Osteodystrophy
Clinical Observation on Bone Metabolism Induced by Chronic Renal Insufficiency
Patients with chronic renal insufficiency usually develop secondary osteoporosis or bone loss, which is called renal osteodystrophy.
- Trial name
- NCT02147782
- Where
- 4 sites in China
- Volunteers
- 300 people, healthy volunteers welcome
- Sponsor
- Shanghai University of Traditional Chinese Medicine
Vitamin D Deficiency, Pre-Eclampsia
Effect of Vitamin D3 Supplementation in Pregnancy on Risk of Pre-eclampsia
Vitamin D deficient pregnant ladies were selected and randomized into 2 groups for routine daily dose of multivitamin (400IU vitamin D3) versus maximum safest treatment daily dose (4000IU vitamin D3).
- Trial name
- NCT03101150
- Testing
- 400 IU Vitamin D3, 4000 IU Vitamin D3
- Volunteers
- 179 people, healthy volunteers welcome
- Sponsor
- King Fahad Medical City
Vitamin-D Insufficiency
Seasonal Variations in Serum 25-hydroxy Vitamin-D Levels in a Swedish Cohort
The purpose of this study was to study seasonal inter-individual and intra-individual variations in S-25(OH)D and to explore parameters associated with S-25-OHD in healthy Swedish adults.
- Trial name
- NCT02136407
- Where
- Sweden
- Volunteers
- 615 people, healthy volunteers welcome
- Sponsor
- Sahlgrenska University Hospital
Vitamin D Deficiency, Vitamin D Insufficiency
The Effects of Serum Vitamin D and IVF Outcome
The purpose of this study is to investigate whether an association exists between serum vitamin D levels and IVF treatment outcome
- Conditions
- Vitamin D Deficiency, Vitamin D Insufficiency, Infertility
- Trial name
- VIDIO (NCT02187146)
- Where
- United Kingdom
- Volunteers
- 504 people, healthy volunteers welcome
- Sponsor
- University of Birmingham
Vitamin D Deficiency
Improving the Understanding of the Response to Vitamin D Supplementation
It is the investigators hypothesis that the current method of evaluating vitamin D status, measuring circulating 25-hydroxy vitamin D is not providing the full metabolic picture, and is therefore inadequate.
- Trial name
- NCT01465178
- Testing
- cholecalciferol
- Where
- United States
- Volunteers
- 62 people, healthy volunteers welcome
- Sponsor
- University of Wisconsin, Madison
Chronic Kidney Disease, Renal Osteodystrophy
Serum Sclerostin Levels, Cardiovascular Parameters and Carpal Tunnel Syndrome in Maintenance Hemodialysis Patients
Sclerostin, the product of the SOST gene, located on chromosome 17, locus q11.2 in humans, was originally believed to be a non-classical Bone morphogenetic protein (BMP) antagonist.Sclerostin was recently identified as a…
- Conditions
- Chronic Kidney Disease, Renal Osteodystrophy, Left Ventricular Hypertrophy
- Trial name
- NCT01382966
- Where
- Turkey (Türkiye)
- Volunteers
- 400 people, healthy volunteers welcome
- Sponsor
- RFM Renal Treatment Services
Healthy
Defining Vitamin D Insufficiency in School Age Children: A Randomized Placebo Controlled Trial of Vitamin D3
The study objective is to characterize the threshold levels of serum 25-hydroxyvitamin D for the definition of vitamin D insufficiency in 8-14 year old African American and Caucasian children.
- Trial name
- Vitamin D RCT (NCT00732758)
- Testing
- Vitamin D3 1000 IU
- Where
- United States
- Volunteers
- 157 people, healthy volunteers welcome
- Sponsor
- University of Pittsburgh
Vitamin D Deficiency, Vitamin D Insufficiency
Solius UV Light Source in Improving Serum Levels of 25-hydroxyvitamin D
This is a feasibility interventional study seeking to determine the safety and efficacy of the Solius Photobiologic System in increasing the serum levels of 25(OH)D in a vitamin D deficient/insufficient adult population.
- Trial name
- NCT04865432
- Testing
- UVB treatment
- Where
- United States
- Volunteers
- 10 people, healthy volunteers welcome
- Sponsor
- Boston University
Depression, Postpartum Depression
Is Vitamin D Insufficiency and Deficiency Associated With Antepartum and Postpartum Depression?
Our primary aim is to evaluate whether Vitamin D deficiency causes depressive symptoms in antepartum and postpartum depression and whether early correction of Vitamin D deficiency improves these symptoms.
- Trial name
- NCT02272387
- Testing
- Vitamin D3 (Cholecalciferol)
- Where
- United States
- Volunteers
- 151 people, healthy volunteers welcome
- Sponsor
- St. Luke's-Roosevelt Hospital Center
Vitamin D Deficiency
Treatment of Vitamin D Insufficiency
The purpose of this study is to answer the following questions: Does vitamin D increase calcium absorption, bone mass and muscle mass and function in women past menopause who have mildly low vitamin D levels? Do these benefits…
- Trial name
- NCT00933244
- Testing
- High Dose Vitamin D3, Low Dose Vitamin D3
- Where
- United States
- Volunteers
- 230 people, healthy volunteers welcome
- Sponsor
- University of Wisconsin, Madison
Chronic Kidney Disease, Vitamin D Deficiency
Vitamin D, Chronic Kidney Disease (CKD) and the Microcirculation
Overall research aims: This study will examine the effect of vitamin D supplementation on the function of the endothelium and microcirculation of patients with chronic kidney disease and vitamin D deficiency.
- Trial name
- NCT00882401
- Testing
- Ergocalciferol (Vitamin D)
- Where
- United Kingdom
- Volunteers
- 64 people, healthy volunteers welcome
- Sponsor
- Barts & The London NHS Trust
Iron Deficiency, Iron Deficiency Anemia (IDA)
Collegiate Athlete Study
The purpose of this study is to determine what percentage of Black collegiate athletes have low energy availability. It will also determine the percentage of Black collegiate athletes who have iron deficiency, suboptimal or low…
- Conditions
- Iron Deficiency, Iron Deficiency Anemia (IDA), Vitamin D Deficiency, Vitamin D Insufficiency
- Trial name
- NCT07631312
- Testing
- Iron and Vitamin D Deficiencies Correction
- Where
- United States
- Volunteers
- 36 people, healthy volunteers welcome
- Sponsor
- Morehouse School of Medicine
Congenital Adrenal Hyperplasia, Familial Hyperinsulinemic Hypoglycemia 1
Baby Detect : Genomic Newborn Screening
Newborn screening (NBS) is a global initiative of systematic testing at birth to identify babies with pre-defined severe but treatable conditions.
- Conditions
- Congenital Adrenal Hyperplasia, Familial Hyperinsulinemic Hypoglycemia 1, Phosphoglucomutase 1 Deficiency, Maturity Onset Diabetes of the Young
- Trial name
- BabyDetect (NCT05687474)
- Where
- Belgium
- Volunteers
- 6,824 people, healthy volunteers welcome
- Sponsor
- Centre Hospitalier Universitaire de Liege
Vitamin D Deficiency, Vitamin D Insufficiency
Trial to Assess Vitamin D Requirements in Lactating Women
This is a randomized, placebo-controlled trial of vitamin D supplementation with 20mcg cholecalciferol (to achieve a total intake of 25mcg/day), with or without 500mg calcium to assess vitamin D requirements in lactating women…
- Trial name
- DMUMs (NCT01349127)
- Testing
- 20µg Vitamin D3, 20µg Vitamin D3 + 500 mg Calcium
- Where
- Ireland
- Volunteers
- 136 people, healthy volunteers welcome
- Sponsor
- University College Cork