Clinical trials: Vitamin D, completed
Infection Control
Risk Assessment of Indirect Exposure to the Environment in the Gastrointestinal Endoscopy Center
Study objective: To clarify the risk of exposure to indirect contact and transmission of environmental objects during digestive endoscopy diagnosis and treatment for patients and medical staff, simulating by using Vitamin B2…
- Trial name
- NCT05321043
- Testing
- Vitamin B2 labeling
- Where
- China
- Volunteers
- 100 people
- Sponsor
- Peking Union Medical College Hospital
Melatonin, Breast Cancer Patients Diagnosed
Cardioprotective Effect of Melatonin Versus Vitamin D in Breast Cancer Patients Receiving Doxorubicin
This study aims to assess the cardioprotective effect of melatonin and vitamin D in breast cancer patients who receive doxorubicin.
- Conditions
- Melatonin, Breast Cancer Patients Diagnosed, Vitamin D Concentration, Doxorubicin
- Trial name
- NCT07349459
- Testing
- Group 1 (Doxorubicin group), Group 2: Vitamin D group, Group 3: melatonin group
- Where
- Egypt
- Volunteers
- 90 people
- Sponsor
- Tanta University
Nutrition, Healthy
Bioavailability of Vitamin D(25(OH)D) and Omega-3 Fatty Acid (DHA) Enhanced Chicken
The purpose of the research is to evaluate if chicken or eggs obtained from chickens that are fed a diet that contains omega-3 fatty acids (DHA/EPA), or vitamin D (as 25(OH)D) provides additional health benefits by improving the…
- Trial name
- NCT05248737
- Testing
- non-25(OH)D fortified chicken/eggs plus vitamin D3 supplement, non-DHA bio-enhanced chicken plus supplement DHA Omega-3
- Where
- United States
- Volunteers
- 98 people, healthy volunteers welcome
- Sponsor
- Cornell University
Healthy, Suboptimal Vitamin C Levels
The Impact of Qualia Vitamin C+ on Blood Vitamin C Levels
This is a double-blind, placebo-controlled, parallel-group, study evaluating the effect of a Qualia Vitamin C+ formulation on Whole Blood Vitamin C levels in the blood of healthy adults aged 25 years or older.
- Trial name
- NCT07285109
- Testing
- Qualia Vitamin C+
- Where
- United States
- Volunteers
- 36 people, healthy volunteers welcome
- Sponsor
- Qualia Life Sciences
Post-acne Erythema
Comparison of Fractional CO2 Laser Monotherapy and Its Combination With Either Topical Vitamin C or Topical Timolol in the Treatment of Post-Acne Erythema: A Split Face Study
Acne is very common, especially among young adults. After acne heals, some people are left with persistent red or pink marks, called post-acne erythema (PAE).
- Trial name
- NCT07884565
- Testing
- topical Timolol maleate 0.5% eye drops, topical Vitamin C 15%, Fractional CO2 laser
- Where
- Egypt
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Cairo University
Sperm DNA Fragmentation
HMG Treatment Reduces Sperm DNA Fragmentation
Male factors account for approximately 50% of infertility cases. The principal etiologies of male infertility include sexual dysfunction, semen abnormalities arising from various etiologies, and idiopathic infertility.
- Trial name
- NCT07873502
- Testing
- Human Menopausal Gonadotropin (hMG), Vitamin E
- Where
- China
- Volunteers
- 114 people
- Sponsor
- Jinling Hospital, China
Healthy Volunteers
The Body's Affect on Vitamin C
Pharmacokinetics is the term used for how the body affects a drug once it is taken. Vitamin C, also known as ascorbic acid, is an essential water soluble vitamin.
- Trial name
- NCT00001309
- Testing
- Vitamin C
- Where
- United States
- Volunteers
- 23 people
- Sponsor
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Diabetes, Fatty Liver
Vitamin E Pharmacokinetics and Biomarkers in Normal and Obese Women
Background: Vitamin E is an antioxidant that reduces the damaging effects of oxygen in the body. Most American men (90%) and women (96%) do not get enough vitamin E from their diets; however, the amount of vitamin E needed by the…
- Conditions
- Diabetes, Fatty Liver, Obesity, Healthy Volunteers
- Trial name
- NCT00862433
- Testing
- Alpha tocopherol, Vitamin E, Vitamin C
- Where
- United States
- Volunteers
- 50 people
- Sponsor
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Tooth Whitening, Tooth Discoloration
Clinical Research Study to Evaluate Stain Removal and Whitening Improvement
The objective of this clinical research study is to evaluate the stain removal and whitening improvement of a toothpaste containing Vitamin C and 1100 ppm F as sodium fluoride as compared to a matching placebo toothpaste…
- Trial name
- NCT07870018
- Testing
- Vitamin C toothpaste
- Where
- United States
- Volunteers
- 75 people, healthy volunteers welcome
- Sponsor
- Colgate Palmolive
Diabetic Retinopathy, Non Proliferative Diabetic Retinopathy
Randomized, Controlled Study to Investigate the 12-month Efficacy and Safety of Resveratrol Vitamin Supplements in Patients With Non-proliferative Diabetic Retinopathy Without Center Involved Diabetic Macular Edema (REVOLUTION Study)
This randomized, controlled study aims to investigate the efficacy and safety of resveratrol-containing vitamin supplements in patients with non-proliferative diabetic retinopathy (NPDR) without center-involved diabetic macular…
- Conditions
- Diabetic Retinopathy, Non Proliferative Diabetic Retinopathy, Prospective Study
- Trial name
- REVOLUTION (NCT07868458)
- Testing
- Resveratrol-Containing Vitamin Supplement
- Where
- Greece
- Volunteers
- 100 people
- Sponsor
- University of Athens
Deficiencies Micronutrient, Nutrition Disorders
Effect of Consuming Vitamin A-fortified Sugar on Serum Retinol Levels in Children
The increase in vitamin A deficiency (<20 mcg/dL) among children under five in Colombia (2010-2015) is a public health problem (27.3%).
- Trial name
- NCT07860060
- Testing
- white sugar fortified with retinol, refined white sugar for culinary use
- Where
- Colombia
- Volunteers
- 76 people, healthy volunteers welcome
- Sponsor
- Universidad del Valle, Colombia
Benign Paroxismal Positional Vertigo
BPPV Recurrence After CRM With & Without Supplementation
Benign paroxysmal positional vertigo (BPPV) may frequently recur even after successful canalith repositioning maneuvers (CRMs). This study investigates whether the addition of vitamin K₂ to vitamin D₃ offers additional benefits…
- Trial name
- RR-BPPV-DK (NCT07861464)
- Testing
- Combined vitamin D₃ and K₂ supplementation, Vitamin D₃ alone, Canalith repositioning maneuver (CRM) alone
- Where
- Jordan
- Volunteers
- 404 people
- Sponsor
- University of Jordan
Malignant Mesothelioma
Pemetrexed, Cisplatin, and Vitamin B12 in Treating Patients With Mesothelioma of the Chest That Cannot Be Removed by Surgery
RATIONALE: Pemetrexed may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Drugs used in chemotherapy, such as cisplatin, work in different ways to stop the growth of tumor cells, either by…
- Trial name
- ALIMESO (NCT00541073)
- Testing
- vitamin B12, cisplatin, pemetrexed disodium
- Where
- France
- Volunteers
- 60 people
- Sponsor
- Centre Oscar Lambret
Vasoplegia Syndrome
Effects of Vitamin C on Shock Duration and Microcirculation in Patients With Vasoplegia Syndrome After Cardiac Surgery
This pilot study intends to observe the effect of intravenous vitamin C on the prognosis and sublingual microcirculation in patients with vasoplegia syndrome after cardiac surgery through a prospective randomized controlled study…
- Trial name
- NCT06723626
- Testing
- Vit C, Standard Preparation
- Where
- China
- Volunteers
- 40 people
- Sponsor
- Southeast University, China
Reproductive Issues
The Investigation of Vitamin D and Menstrual Cycles Trial, the inVitD Trial: A Phase II Clinical Trial
Background: About 1.5 million U.S. women of reproductive age are estimated to be infertile. Many more have difficulty getting pregnant. Menstrual cycles are an indicator of a woman's general health.
- Trial name
- NCT05050916
- Testing
- Vitamin D
- Where
- 2 sites in United States
- Volunteers
- 998 people
- Sponsor
- National Institute of Environmental Health Sciences (NIEHS)
Polycystic Ovary Syndrome
The Physiological Responses and Adaptation of Brown Adipose Tissue to Chronic Treatment With Beta3-Adrenergic Receptor Agonists
Background: Brown adipose tissue (BAT) is a type of fat in the body. It may prevent weight gain, improve insulin sensitivity, and reduce fatty liver. Researchers want to see if BAT helps the body burn energy.
- Trial name
- NCT03049462
- Testing
- Mirabegron, B Complex Plus Vitamin C Tablets
- Where
- United States
- Volunteers
- 55 people
- Sponsor
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Healthy Volunteers
Vitamin B12 Absorption Study
This randomized, double-blind, crossover trial (Phase IV) aims to compare the absorption of a novel permeability-enhanced oral vitamin B12 formulation (Ampli-B) versus standard oral vitamin B12 in 12 healthy adults aged 50 years…
- Trial name
- NCT07665671
- Testing
- Ampli-B, Vitamin B12
- Where
- Australia
- Volunteers
- 12 people, healthy volunteers welcome
- Sponsor
- RDC Clinical Pty Ltd
Vitamin B12 Deficiency
A Study to See if a Combination of Vitamins That is Injected Into a Muscle is as Good and Safe as a Vitamin That is Taken by Mouth
Primary efficacy objective: To investigate the effects of a parenterally vitamin B12 combination treatment versus an oral vitamin B12 mono therapy on the vitamin B12 status in female and male patients as determined by the change…
- Trial name
- EASYVIT (NCT07029698)
- Testing
- Vitamin B12, Vitamin B6, Folic acid, Vitamin B12 (Cyanocobalamin)
- Where
- 2 sites in Ukraine
- Volunteers
- 46 people
- Sponsor
- Medice Arzneimittel Pütter GmbH & Co KG
Breast Cancer Surgery Pain
Postoperative Analgesic Consumption After Preoperative Gabapentin vs Placebo in Breast Cancer Surgery
The study will be conducted after approval from the Scientific and Ethical Review Committees. Eligible patients will be enrolled after obtaining written informed consent and randomly allocated to Group A (gabapentin) or Group B…
- Trial name
- NCT07804784
- Testing
- Oral Gabapentin pre-op, Vitamin B complex tablets (Neurorubine TM -Forte Lactab TM)
- Where
- Pakistan
- Volunteers
- 60 people
- Sponsor
- Shaukat Khanum Memorial Cancer Hospital & Research Centre
Male Osteoporosis
Novel Combination Therapy for Osteoporosis in Men
Osteoporotic fractures are a key health problem in older men. Although there are drugs approved to treat osteoporosis in men [bisphosphonates, denosumab, and teriparatide (TPTD) or PTH(1-34)], there is a lack of knowledge on how…
- Trial name
- Osteo-Men (NCT03994172)
- Testing
- Teriparatide or human parathyroid hormone (PTH) 1-34, Cinacalcet, Calcium citrate tablet
- Where
- United States
- Volunteers
- 40 people
- Sponsor
- VA Office of Research and Development