Clinical trials: Vitamin D
Premenstrual Syndrome
Altered Calcium and Vitamin D in PMDD or Severe PMS
Osteoporosis has become one of the most widely recognized disorders of our times affecting an estimated 25 million women in this country.
- Trial name
- NCT00005119
- Testing
- Measures of calcium and bone turnover
- Where
- United States
- Volunteers
- healthy volunteers welcome
- Sponsor
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Vitamin D Deficiency, Orthostatic Intolerance
Vitamin D Deficiency and Dysautonomia
In previous work the investigator identified a group of children between the ages of 10-18 years whose diagnostic workup for chronic nausea unexplained by conventional diagnostic tests has unexpectedly revealed underlying…
- Conditions
- Vitamin D Deficiency, Orthostatic Intolerance, Nausea
- Trial name
- NCT03032328
- Testing
- vitamin D supplement
- Where
- United States
- Volunteers
- 31 people, healthy volunteers welcome
- Sponsor
- Wake Forest University Health Sciences
Healthy
Vitamin D Needs of Early Adolescent Children
While a large percentage of children have low blood vitamin D levels, the significance of these low levels and the impact on health is unclear.
- Trial name
- NCT00931580
- Testing
- Vitamin D3
- Where
- 3 sites in United States
- Volunteers
- 323 people, healthy volunteers welcome
- Sponsor
- University of Georgia
Healthy
Study Comparing Two Isoforms of Vitamin D Supplements for Infants
There are two different types of vitamin D - vitamin D3 (animal source) and vitamin D2 (plant source). Almost all the usual vitamin D preparations for infants available in Canadian pharmacies contain vitamin D3 which may not be…
- Trial name
- NCT01190137
- Testing
- Cholecalciferol (D3) or ergocalciferol (D2)
- Where
- Canada
- Volunteers
- 52 people, healthy volunteers welcome
- Sponsor
- McGill University
Pelvic Organ Prolapse
Alfacalcidol Supplementation on Levator Ani Muscle Strength of Menopausal Pelvic Organ Prolapse Patients
This is a study performed to evaluate the role of vitamin D supplementation on the strength of levator ani muscle in menopausal women with pelvic organ prolapse
- Trial name
- NCT05505253
- Testing
- Alfacalcidol 0.0005 MG
- Where
- Indonesia
- Volunteers
- 48 people, healthy volunteers welcome
- Sponsor
- Universitas Padjadjaran
Obesity, Insulin Resistance
A Trial to Study the Effect of Long Term Vitamin D Supplementation on Insulin Sensitivity
Type 2 diabetes is a major public health problem in India with an estimated a prevalence of approximately 4% and 12% in rural and urban areas respectively.
- Trial name
- LongtermVitD (NCT01052181)
- Testing
- Cholecalciferol
- Where
- India
- Volunteers
- 300 people, healthy volunteers welcome
- Sponsor
- Dr Jitender Nagpal
Oxidative Stress, Anesthesia
Comparison of Total Oxidant and Total Antioxidant Capacities in Low-Flow and High-Flow General Anesthesia
The goal of this observational study is to determine whether low-flow anesthesia has a positive contribution to the total oxidant/antioxidant balance.
- Trial name
- NCT05590312
- Testing
- general anesthesia
- Where
- Turkey (Türkiye)
- Volunteers
- 72 people, healthy volunteers welcome
- Sponsor
- Duzce University
Vitamin D Deficiency
Bioavailability of Vitamin D Encapsulated in Casein Micelles, Compared to Its Bioavailability in a Synthetic Emulsifier Currently Used for Supplementation and Enrichment.
Background: Vitamin D3 (VD) is an oil soluble vitamin formed in the skin during exposure to UV light. It is essential for bone and calcium metabolism, insulin reactivity, immune system etc.
- Trial name
- VD (NCT01807845)
- Testing
- enriched skimmilk with VD, Skimmilk enriched with VD wherein the VD will be emulsified using Tween 80
- Where
- Israel
- Volunteers
- 90 people, healthy volunteers welcome
- Sponsor
- Rambam Health Care Campus
Hypocalcemia
Effect of Preoperative High-dose Cholecalciferol in Prevention of Post-thyroidectomy Hypocalcaemia
Hypocalcaemia after thyroidectomy is observed with increasing frequency, often resulting in prolonged hospital stay with increased use of resources, delayed return to work and reduced quality of life.
- Trial name
- NCT05586529
- Testing
- Cholecalciferol
- Where
- Pakistan
- Volunteers
- 170 people, healthy volunteers welcome
- Sponsor
- Pak Emirates Military Hospital
Pre-Diabetic
Effect of 1,25-dihydroxyvitamin D3, Treatment on Insulin Secretion and Muscle Strength in Pre-diabetic Persons
The purpose of this research is to study the effects of 1,25(OH)2 D3 (a prescription form of active Vitamin D) on muscle strength and insulin secretion by the pancreas and glucose utilization by skeletal muscle.
- Trial name
- NCT04286529
- Testing
- Calcitriol capsules
- Where
- United States
- Volunteers
- 17 people, healthy volunteers welcome
- Sponsor
- Mayo Clinic
Gastric Bypass, Parathyroid Hormone
Trial Of Paricalcitol and Cholecalciferol(Vitamin D3) in the Treatment Of Secondary Hyperparathyroidism in Patients After ROUX-EN-Y Gastric Bypass Surgery
Evaluate the efficacy of paricalcitol, cholecalciferol, and placebo in the reduction of parathyroid hormone in patients after Roux-en-Y gastric bypass surgery (RYGB).
- Trial name
- ExtenD (NCT01138475)
- Testing
- Paricalcitol, Cholecalciferol
- Where
- United States
- Volunteers
- 49 people, healthy volunteers welcome
- Sponsor
- Kerstyn C. Zalesin, M.D.
PCOS, Depression
Metformin, Vitamin D, and Depression in Polycystic Ovary Syndrome (PCOS) Trial
Open-label randomized clinical trial assessing the efficacy of Metformin versus Vitamin D in improving symptoms of depressed mood in polycystic ovary syndrome.
- Conditions
- PCOS, Depression, Vitamin D Deficiency, Insulin Resistance
- Trial name
- MINDD (NCT03380091)
- Testing
- Metformin, Vitamin D
- Where
- United States
- Volunteers
- 5 people, healthy volunteers welcome
- Sponsor
- University of California, San Francisco
Healthy, Adult
Understanding Effects of Calcium on the Gut-Bone Axis
The study team is inviting 13 healthy people to complete a study to explore how calcium affects hormones and bones after eating. Participants will be asked to complete two study visits within eight weeks.
- Conditions
- Healthy, Adult, Calcium, Bone Resorption
- Trial name
- NCT06383117
- Testing
- Calcium carbonate
- Where
- United States
- Volunteers
- 14 people, healthy volunteers welcome
- Sponsor
- University of Georgia
Obesity
Duration of Vitamin D Stores After Prolonged Vitamin D Substitution
Ingested or skin produced vitamin D is either hydroxylated in the liver to 25-hydroxyvitamin D (25(OH)D), metabolized and excreted in the urine, or stored in adipose and other tissues.
- Trial name
- NCT01729013
- Where
- Norway
- Volunteers
- 78 people, healthy volunteers welcome
- Sponsor
- University of Tromso
Periodontitis
Effects of Smoking and Vitamin D3 on the Levels of Human Cathelicidin Peptide LL-37
The aims of our study were 1) to evaluate levels of gingival crevicular fluid( GCF) human cathelicidin peptide LL-37 and serum vitamin D3 in smoker and non-smoker patients with chronic periodontitis(CP) 2) to determine whether…
- Trial name
- NCT03923218
- Testing
- LL-37 levels in Gingival crevicular fluid, Serum Vitamin D3 levels, Clinical parameters
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Gazi University
Healthy
Vitamin D in Healthy Adults After Strenuous Endurance Exercise
The purpose of this study was to investigate the effects of vitamin D supplementation on biochemical response and aerobic capacity after strenuous endurance exercise (SEE).
- Trial name
- NCT05779410
- Testing
- Vitamin D, Medium-chain triglycerides
- Where
- Taiwan
- Volunteers
- 35 people, healthy volunteers welcome
- Sponsor
- Taipei Medical University
Frail Elderly Syndrome
Management of Frailty in Older Adults With Turmeric and Tulsi Supplements
The aim of this study is to determine the efficacy of turmeric and tulsi polyherbal formulation in the management of frailty in the elderly population.
- Trial name
- NCT03365310
- Testing
- C. longa, curcuminoids , Z. officianale, O. sanctum along with 200 ml of Milk, Standard of Care
- Where
- India
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- Composite Interceptive Med Science
Stroke, Oral Disease
Oral Health and Vitamin D in Stroke Patients
Stroke is a common, serious and restrictive global health problem. Restricting the activities of daily living of stroke patients impairs patients' ability to pay attention to oral hygiene.
- Conditions
- Stroke, Oral Disease, D Vitamin Deficiency
- Trial name
- NCT05418335
- Testing
- Clinical examination, functional status evaluation
- Where
- Turkey (Türkiye)
- Volunteers
- 90 people, healthy volunteers welcome
- Sponsor
- Abant Izzet Baysal University
Aging
Vitamin D and Resistance Exercise in Elderly (NUTRIAGINGVitD)
The aim of this randomized, double-blind, controlled intervention study with parallel groups is to investigate the effect of resistance training (2x/week for 10 weeks) with and without different goals of vitamin D intake on…
- Trial name
- NCT04341818
- Testing
- Strength Training and Vitamin D monthly, Strength Training and Vitamin D daily, Strength Training and no Vitamin D
- Where
- Austria
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- University of Vienna
Bariatric Surgery Candidate, Vitamin Deficiency
Absorption of Transdermal Vitamins in Post Bariatric Surgery Patients
Patients undergoing bariatric surgery often develop new vitamin and/or mineral deficiencies or exacerbate prior deficiencies after surgery.
- Conditions
- Bariatric Surgery Candidate, Vitamin Deficiency, Mineral Deficiency
- Trial name
- NCT03360435
- Testing
- Patch MD MultiVitamin Plus patch
- Where
- United States
- Volunteers
- 99 people, healthy volunteers welcome
- Sponsor
- University of Florida
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