Clinical trials: Vitamin D Deficiency, completed
Accidental Falls
The FREEDOM Study: a Randomised Controlled Trial of Sunlight and Calcium in Older People
The proposed study will determine the effect of a public health strategy (ie. increased sun light exposure and increased calcium intake) to reduce falls in older people in residential care using a randomised trial.
- Trial name
- NCT00322166
- Testing
- Sunlight, Sunlight and calcium, control
- Where
- Australia
- Volunteers
- 600 people, healthy volunteers welcome
- Sponsor
- University of Sydney
Cardiovascular Disease, Chronic Kidney Disease
Vascular Risk After Kidney Transplantation
Hypothesis: Nontraditional risk factors, such as inflammation, vitamin D deficiency, elevated PTH, insulin resistance, homocysteine, or uric acid, contribute to cardiovascular disease progression after kidney transplant.
- Conditions
- Cardiovascular Disease, Chronic Kidney Disease, Diabetes, Vitamin D Deficiency
- Trial name
- NCT00374595
- Where
- United States
- Volunteers
- 338 people
- Sponsor
- University of Nebraska
Vitamin D Deficiency
Physical Exercise and Diet Management in Vitamin D Deficient Females
The purpose of this study was to determine if home based physical exercises protocol and Diet management has an effect on functional performance and depression level related to vitamin D deficiency in females.
- Trial name
- NCT06114381
- Testing
- Home Based Physical Exercise, Vitamin D3 Supplements, Diet Management
- Where
- Saudi Arabia
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- Badr University
Hemodialysis Patients, Vitamin D Insufficiency
Effect of Omega-3 Fatty Acid on Vitamin D Activation
Extra-renal sources of 1, 25-dihydroxyvitamin D can be increased to normal serum 1, 25-dihydroxyvitamin D levels in chronic kidney disease patients after administration of high dose 25-hydroxyvitamin D.
- Conditions
- Hemodialysis Patients, Vitamin D Insufficiency, Vitamin D Deficiency
- Trial name
- NCT01596842
- Testing
- Omega-3 fatty acid ethylester 90, Olive oil, cholecalciferol
- Where
- South Korea
- Volunteers
- 17 people
- Sponsor
- Dong-A University
COVID-19 Pandemic, Vitamin D Deficiency
COVID-19 and Vitamin D: Length of Hospital Stay and Mortality
The lack of a pharmacological treatment in the COVID-19 pandemic has pushed scientists to search for this issue. Maintaining optimal health is parallel to adequate and balanced nutrition.
- Trial name
- NCT05221983
- Where
- Turkey (Türkiye)
- Volunteers
- 168 people
- Sponsor
- Yuksek Ihtisas University
Vitamin D Deficiency
Vitamin D Deficiency, Insulin Resistance and FGF-23
The purpose of this project is to determine if treating vitamin D deficiency decreases insulin resistance and improves insulin secretion in healthy volunteers.
- Trial name
- NCT00491322
- Testing
- Ergocalciferol
- Where
- United States
- Volunteers
- 92 people, healthy volunteers welcome
- Sponsor
- Massachusetts General Hospital
X-linked Hypophosphatemia (XLH)
Retrospective and Prospective Disease Progression and Quality of Life in XLH
There is limited empirical data documenting disease progression and impact on quality of life for patients with X-linked hypophosphatemia (XLH).
- Trial name
- NCT04049877
- Testing
- None - Observational study
- Where
- United Kingdom
- Volunteers
- 11 people
- Sponsor
- Medialis Ltd.
Chronic Kidney Disease Stage 5
Efficacy of Plant-protein Diets in Patients With Chronic Kidney Disease
The purpose of this study is to evaluate the efficacy of plant-protein diets for 12 weeks in patients with advanced chronic kidney disease.
- Trial name
- NCT05350098
- Testing
- Plant-protein Diets, Control Diets
- Where
- Japan
- Volunteers
- 40 people
- Sponsor
- Osaka University
X-Linked Hypophosphatemia
Long-Term Extension Study of KRN23 in Adult Subjects With X-Linked Hypophosphatemia (XLH)
The primary objectives of this study are to: Assess the long-term safety of KRN23 subcutaneous (SC) administration in adult subjects with XLH Assess the proportion of subjects achieving serum phosphorus levels in the normal range…
- Trial name
- NCT02312687
- Testing
- KRN23
- Where
- 5 sites in United States
- Volunteers
- 20 people
- Sponsor
- Kyowa Kirin, Inc.
Urinary Incontinence, Vitamin D Deficiency
Vitamin D Supplementation in Older Adults With Urinary Incontinence
Urinary incontinence (UI) is a common disorder among older women that greatly affects quality of life. Emerging evidence from observational studies links vitamin D insufficiency with UI.
- Trial name
- NCT01971801
- Testing
- Vitamin D3 50,000 IU
- Where
- United States
- Volunteers
- 243 people
- Sponsor
- University of Alabama at Birmingham
Hypovitaminosis D, Cardiovascular Diseases
Vitamin D Supplementation on in Major Orthopedic Surgery
Prospective, monocentric study in open, aimed at evaluating the effects of supplementation with calcifediol on left ventricular function parameters in cardiopathic subjects undergoing major orthopedic surgery.
- Trial name
- NCT03403933
- Testing
- Didrogyl
- Where
- Italy
- Volunteers
- 74 people, healthy volunteers welcome
- Sponsor
- I.R.C.C.S Ospedale Galeazzi-Sant'Ambrogio
Autism, Vitamin D Deficiency
Open Label Clinical Trial of Vitamin D in Children With Autism
Primary: to investigate tolerability of interventional high dose Vitamin D3 supplementation, titrated to reach serum levels near the high end of the reference range (30-100 ng/ml), in vitamin D deficient pediatric Autism Spectrum…
- Trial name
- NCT01535508
- Testing
- Liquid Vitamin D
- Where
- United States
- Volunteers
- 10 people
- Sponsor
- University of California, San Francisco
X-linked Hypophosphatemic Rickets/Osteomalacia
A Study of KRN23 in Subjects With X-linked Hypophosphatemic Rickets/Osteomalacia
The objective of this study is to assess the safety and tolerability of KRN23 after a single subcutaneous (SC) administration in subjects with X-linked hypophosphatemic rickets/osteomalacia (XLH) in Japan or Korea.
- Trial name
- NCT02181764
- Testing
- KRN23
- Where
- 2 sites in Japan, South Korea
- Volunteers
- 15 people
- Sponsor
- Kyowa Kirin Co., Ltd.
Vitamin D Deficiency, 25-Hydroxyvitamin D Concentration
Is Vitamin D2 Treatment-associated Decrease in 25(OH)D3 Level a Reciprocal Phenomena?
Several studies have demonstrated that D2 treatment is associated with a decrease in 25(OH)D3 level and therefore have proposed that D3 would be preferable in term of raising total 25(OH)D level.
- Trial name
- NCT03035084
- Testing
- Vitamin D3, Vitamin D2
- Where
- Saudi Arabia
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- King Faisal Specialist Hospital & Research Center
Hypovitaminosis D
To Study the Nutri-Genomic Response of Vit-D Supplementation in African-Americans
Three hundred thirty (330) overweight, pre-hypertensive/controlled hypertensive, African-American participants will be enrolled in a 8 week study to assess the effect of two administrations of Vitamin D3 on Vitamin D serum…
- Trial name
- NCT02802449
- Testing
- 25 Hydroxy- Vitamin D3 [25 (OH) D3]
- Where
- United States
- Volunteers
- 330 people, healthy volunteers welcome
- Sponsor
- Charles Drew University of Medicine and Science
Hypovitaminosis D, Spinal Disease
Analysis of Hypovitaminosis D and Osteopenia/Osteoporosis in Spinal Disease Patients Who Underwent a Spinal Fusion at Illinois Neurological Institute, Peoria, IL., a Retrospective Review From November 1, 2012 to October 31, 2014 and Prospective Pilot From July 1, 2015-June 30, 2016
The purpose of this study is to determine if there is correlation between Vitamin D deficiency and spinal disease/spinal fusion surgery.
- Conditions
- Hypovitaminosis D, Spinal Disease, Osteoporosis
- Trial name
- NCT02534714
- Where
- United States
- Volunteers
- 460 people
- Sponsor
- OSF Healthcare System
Vitamin D Deficiency
Bioefficiency of of Conventional Fish and Vitamin D Fortified Fish
The aim of this study is to investigate the bioavailability of conventional and vitamin D fortified fish as measured by the increase of the specific hydroxy form by 25(OH)D3.
- Trial name
- NCT01696526
- Testing
- vitamin D fortified fish, conventional fish
- Where
- Germany
- Volunteers
- 53 people, healthy volunteers welcome
- Sponsor
- Ulrike Lehmann
Vitamin D Deficiency
The Effect of a Meal on Vitamin D Absorption
This study seeks to determine if vitamin D3 absorption in healthy adults will be enhanced in the presence of a meal and if the enhancement will be greater when the meal is low as opposed to high in fat content.
- Trial name
- NCT01268176
- Testing
- cholecalciferol
- Where
- United States
- Volunteers
- 62 people, healthy volunteers welcome
- Sponsor
- Tufts University
Hypophosphatemic Rickets
Burosumab and 1-25 (OH) Vitamin D on Human Osteoclasts
Fibroblast growth factor 23 (FGF23) is the cornerstone of phosphate / calcium / vitamin D metabolism: it is synthesized mainly by osteocytes and acts as a Phosphating agent, inhibitor of dihydroxyvitamin D, and inhibitor of…
- Trial name
- HYPO-CLASTE (NCT04184661)
- Testing
- blood sample
- Where
- 3 sites in France
- Volunteers
- 52 people
- Sponsor
- Hospices Civils de Lyon
Chronic Kidney Disease-Mineral and Bone Disorder
Relationship Between Serum 1,25-dihydroxy Vitamin D and Markers of Bone Metabolism in Renal Dysfunction Patients
This cross-sectional study was conducted, including those subjects tested for 1,25(OH)2D during Jan 2015-Dec 2021. Estimated glomerular filtration rate (eGFR) was calculated and subjects were classified into chronic kidney…
- Trial name
- NCT05399251
- Volunteers
- 1,553 people
- Sponsor
- Aga Khan University Hospital, Pakistan