Clinical trials: Deficiency Vitamins, open to volunteers
Hypovitaminosis D
The Effectiveness of a Weight-dependent Algorithm for Dosing Vitamin D.
Vitamin D is essential for calcium absorption and bone growth, brain development, and immune system function. Vitamin D is produced by the body in response to natural sunlight.
- Trial name
- NCT07876843
- Testing
- Vitamin D3, Calcium, and Vitamin C
- Where
- United States
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- Atlantic Health System
Vitamin D Deficiency
Vitamin D Status and Its Influencing Factors in Zhejiang Province: A Multicenter Cross-Sectional Study
Vitamin D deficiency is a global public health problem, with an estimated 1 billion people affected worldwide, and large-scale systematic data for Zhejiang Province remain scarce.
- Trial name
- NCT07866391
- Where
- 2 sites in China
- Volunteers
- 10,000 people, healthy volunteers welcome
- Sponsor
- First Affiliated Hospital of Zhejiang University
Vitamin D Deficiency
Bone Myoregulation Reflex and Postural Control in Vitamin D Deficiency
This observational study aims to investigate the relationship between vitamin D deficiency, postural stability, and neuromuscular control mechanisms in adults.
- Trial name
- BMR-VITD (NCT07435935)
- Where
- Turkey (Türkiye)
- Volunteers
- 24 people, healthy volunteers welcome
- Sponsor
- Istanbul Physical Medicine Rehabilitation Training and Research Hospital
Infant Vitamin K Status, Vitamin K Deficiency Bleeding
The OK Daily Study
The OK Daily Study is a multi-centred, part-randomised, part blinded, four cohort study. We are exploring daily dietary supplementation with vitamin K2, specifically menaquinone-7 (MK-7), given to breastfed infants or…
- Trial name
- NCT07620236
- Testing
- Combined MK-7 + vitamin D3 drops, Vitamin D3 Drops, MK-7 capsules
- Volunteers
- 134 people, healthy volunteers welcome
- Sponsor
- Norfolk and Norwich University Hospitals NHS Foundation Trust
Dental Implant, Dental Implant Failed
Effect of Systemic Vitamin D on Dental Implant Osseointegration
The primary goal for any oral implantologist is to obtain satisfactory healing and long-term treatment success. Osseointegration is the key to dental implant success8 and is required to achieve direct structural and functional…
- Conditions
- Dental Implant, Dental Implant Failed, Vitamin D Deficiency
- Trial name
- VIDOS (NCT07684404)
- Testing
- Vit D
- Where
- Egypt
- Volunteers
- 10 people, healthy volunteers welcome
- Sponsor
- Future University in Egypt
Vitamin D 25-Hydroxylase Deficiency, Vitamin D Deficiency/Insufficiency
Effects of High-Dose Vitamin D on Hormones, Neuromuscular Function, Cognition, and Body Composition in Athletes
This study aims to evaluate the effects of high-dose vitamin D3 supplementation on selected physiological, neuromuscular, and cognitive parameters in athletes.
- Trial name
- NCT07641075
- Testing
- Vitamin D supplementation
- Where
- Poland
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- The Jerzy Kukuczka Academy of Physical Education in Katowice
Periodontal Diseases, Gingivitis
The Effect of Vitamin D Supplementation on the Anti-inflammatory Response in Periodontal Diseases
A review of the literature revealed that while there are studies investigating the relationship between vitamin D and periodontal disease, there are no studies investigating the anti-inflammatory effect of vitamin D on…
- Conditions
- Periodontal Diseases, Gingivitis, Vitamin D Deficiency
- Trial name
- NCT07636733
- Testing
- Non-surgical periodontal treatment, Vitamin D administration, Oral Hygiene Education and Patient Motivation
- Where
- Turkey (Türkiye)
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- Recep Tayyip Erdogan University Training and Research Hospital
Vitamin D Deficiency, Vitamin D Insufficiency
ALPCO 25(OH) Vitamin D CLIA Kit - Fresh Versus Frozen Serum and Plasma Stability Study
This study evaluates the stability of 25-hydroxyvitamin D [25(OH)D] measurements in human serum and plasma using the ALPCO 25(OH) Vitamin D CLIA Kit.
- Conditions
- Vitamin D Deficiency, Vitamin D Insufficiency, Healthy Volunteers
- Trial name
- NCT07565064
- Testing
- ALPCO 25(OH) Vitamin D CLIA Kit
- Where
- United States
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- American Laboratory Products Company
Overactive Bladder, Vitamin D Deficiency
The Role of Urinary RhoA, NGF, and BDNF Levels in Overactive Bladder and Vitamin D Deficiency
The primary aim of this study is to evaluate the role of three specific urinary proteins-RhoA, Nerve Growth Factor (NGF), and Brain-Derived Neurotrophic Factor (BDNF)-as potential biomarkers for the diagnosis and follow-up of…
- Trial name
- NCT07513363
- Testing
- Urotherapy
- Where
- Turkey (Türkiye)
- Volunteers
- 52 people, healthy volunteers welcome
- Sponsor
- Tarik Emre Sener
Visual Snow Syndrome, Migraine
Investigating Brain Function in People With and Without Visual Snow Syndrome Using Adaptation to Visual Stimuli
The goal of this study is to learn more about the brain pathways and activity involved in creating Visual Snow Syndrome (VSS). The main questions it aims to answer are: Does VSS arise from spontaneous activity in brain pathways?…
- Conditions
- Visual Snow Syndrome, Migraine, Healthy
- Trial name
- VPVSS (NCT06961864)
- Testing
- Visual Adaptation, Assessments and Questionnaires, Functional Magnetic Resonance Imaging (fMRI)
- Where
- United States
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- University of Minnesota
Vitamin D Deficiency
Effects of Different Vitamin D3 Formulations in Vitamin D-Deficient Adults
This randomized controlled superiority pilot trial will evaluate the efficacy of two vitamin D3 formulations administered over eight weeks in adults with subclinical or clinical vitamin D deficiency.
- Trial name
- AMORPH-D (NCT07317830)
- Testing
- Experimental 1 (powdered supplement), Experimental 2 (oily supplement)
- Where
- Serbia
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- Center for Health Sciences, Serbia
Neurosonographic Findings of Vitamin D Deficiency
Neurosonographic Findings in Pregnant Women With Vitamin D Deficiency
In the study, the potential effects of vitamin D deficiency on fetal neurodevelopmental parameters will be examined. In this context, fetal brain development will be compared between pregnant women with and without vitamin D…
- Trial name
- NCT06903247
- Testing
- Neurosonographic Findings of Vitamin D Deficiency in Single Healthy Pregnancies Presenting for Routine Antenatal Care Between 20-30 Weeks of Gestation.
- Where
- Turkey (Türkiye)
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Sanliurfa Education and Research Hospital
Hypovitaminosis D, Hypovitaminosis
Evaluating Response to Vitamin D3 and K2 Supplementation in Healthcare Personnel
The main purpose of this research study is to learn about the effects of supplemental vitamin D3 and vitamin K2 on blood levels and the gut microbial community, called the gut microbiome.
- Trial name
- NCT07199829
- Testing
- Vitamin Arm 1, Vitamin Arm 2, Vitamin Arm 3
- Where
- United States
- Volunteers
- 96 people, healthy volunteers welcome
- Sponsor
- Madigan Army Medical Center
Pediatric Fractures, Hypovitaminosis D
Bone Outcomes, Obesity, Sunlight, and Trauma in Children
Prospective case-control study of children (3-15 years) after low-energy trauma. We compare serum bone metabolic markers (25OHD, PTH, ALP, calcium, phosphate), BMI/percentile, and dietary calcium intake between fracture and…
- Conditions
- Pediatric Fractures, Hypovitaminosis D, Obesity and Overweight
- Trial name
- BOOST (NCT07143552)
- Where
- 2 sites in Italy
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Paracelsus Medical University
Maxillary Transverse Deficiency Class I Malocclusion Vitamin D Deficiency Orthodontic Tooth Movement Adolescent Health
Effect of Serum Vitamin D on MARPE Treatment Response
A total of 30 patients are planned to be included in the study during the first half of 2025, who will apply to the clinic. In our clinical routine, approximately 30% of RME patients are treated using the MARPE method.
- Trial name
- NCT06943443
- Testing
- Miniscrew-Assisted Rapid Palatal Expansion (MARPE) Treatment
- Where
- Turkey (Türkiye)
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- Konya Necmettin Erbakan Üniversitesi
Nutritional Status, Nutrient Deficiency
Challenges in Achieving Adequate Dietary Status of Women
The aim of the study is to investigate the dietary habits of women of reproductive age (20-49 years). We aim to obtain epidemiological data on the intake and adequacy of key macronutrients and micronutrients, as well as to…
- Conditions
- Nutritional Status, Nutrient Deficiency, Micronutrient Deficiency, Vitamin D Deficiency
- Trial name
- NutriFem (NCT06745817)
- Testing
- Assessement of nutritional status, Dermis density and thickness, Skin elasticity
- Where
- 3 sites in Slovenia
- Volunteers
- 300 people, healthy volunteers welcome
- Sponsor
- Institute of Nutrition, Slovenia (Nutris)
Vitamin A Deficiency, Inflammation
Validation and Simplification of the Retinol Isotope Dilution Technique in Burkinabe Schoolchildren
Two cross-sectional, repeated-pass, community-based studies will be carried out during the school year. The first study will be conducted from November to December.
- Trial name
- RID_VAB (NCT06759493)
- Testing
- Retinol isotope dilution technique
- Where
- Burkina Faso
- Volunteers
- 158 people, healthy volunteers welcome
- Sponsor
- Institut de Recherche en Sciences de la Sante, Burkina Faso
Vitamin D Deficiency
Vitamin D and Health Status of British African-Caribbean Women
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.
- Trial name
- NCT04179370
- Testing
- N/A - no intervention. Observational study.
- Where
- United Kingdom
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- University of Surrey
Vitamin B12 Nutritional Deficiency
Effect of Methylcobalamin and Cyanocobalamin Consumption on Vitamin B12 Nutritional Status
Vitamin B12 (B12, Cobalamin) is an essential micronutrient that humans are not capable of synthesizing and therefore must be ingested through food. In nature, B12 is basically only present in foods of animal origin.
- Trial name
- NORMB12 (NCT05785585)
- Testing
- Methylcobalamin, Cyanocobalamin group, Control group
- Where
- 2 sites in Spain
- Volunteers
- 54 people, healthy volunteers welcome
- Sponsor
- Fundació Eurecat
Meniere Disease, Osteoporosis
Menier's Disease - Bone Density Study
Meniere's disease is a progressive and debilitating inner ear disease characterised by vertigo and hearing loss. Several studies have linked Menierws disease with lower bone density and lower vitamin D levels.
- Conditions
- Meniere Disease, Osteoporosis, Osteopenia, Vitamin D Deficiency
- Trial name
- NCT05322538
- Testing
- vitamin D plasma levels baseline, Dual-energy X-ray absorptiometry at baseline, cervical Vestibular evoked myogenic potentials at baseline
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- HaEmek Medical Center, Israel