Clinical trials: Vitamin C
Skin Health
An Investigation of the Effects of a Skin Serum Containing Propolis on Skin Health and Appearance
This is a virtual, single-group clinical trial that will last 8 weeks. Participants will use the Manuka Health Pro Vitality Daily Restorative Face Serum with Propolis \& Vitamin C twice daily and complete questionnaires at…
- Trial name
- NCT06148740
- Testing
- Manuka Health Pro Vitality Daily Restorative Face Serum with Propolis & Vitamin C
- Where
- United States
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Manuka Health
COVID-19
The Use of Chinese Herbal Medicine and Vitamin C by Hospital Care Workers in HK to Prevent COVID-19
This is a prospective randomized controlled trial study to explore whether the combination of Chinese herbal medicine and Vitamin C is effective and safe to prevent COVID-19 transmission among health care workers in Hong Kong…
- Trial name
- CHM-Cov-19-RCT (NCT05360004)
- Testing
- Chinese herbal medicine
- Volunteers
- 652 people, healthy volunteers welcome
- Sponsor
- Hong Kong Baptist University
Healthy
Renal Metabolism of Glycolate to Oxalate
This study will determine the contribution of glycolate metabolism to urinary oxalate excretion in healthy subjects, using carbon 13 isotope glycolate tracer technique and a low-oxalate controlled diet.
- Trial name
- NCT04437225
- Testing
- Low oxalate controlled Diet, Primed, continuous intravenous infusion of 13C2-Glycolate, Bolus intravenous infusion of 13C2-Glycolate
- Where
- United States
- Volunteers
- 15 people, healthy volunteers welcome
- Sponsor
- University of Alabama at Birmingham
Precursor Cell Lymphoblastic Leukemia-Lymphoma, Vitamin D Deficiency
Nutrition and Body Composition in Acute Lymphoblastic Leukemia
Many adolescents with acute lymphoblastic leukemia (ALL) have been found to have low bone density by the end of treatment. This can lead to long-term suffering in survivors due to poor bone health.
- Trial name
- NCT01317940
- Testing
- Vitamin D and Calcium Citrate
- Where
- United States
- Volunteers
- 76 people, healthy volunteers welcome
- Sponsor
- Children's Hospital Los Angeles
Visible Light Exposure on Healthy Back Skin
ANTIPIGMENTING OR DEPIMENTING EFFICACY UNDER PART OF VISIBLE LIGHT
The study intends to validate a protocol and define a positive reference to evaluate the efficacy of anti-pigmenting and depigmenting agents under part of visible Light exposures, between 400nm to 450nm.
- Trial name
- ACR_BIOVI_21-0 (NCT06945393)
- Testing
- Cosmetic topical products
- Where
- Romania
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- L'Oreal
Vitamin D Deficiency
The D-BIICEP Study
Athletes and active individuals have been identified as an at-risk group for a low vitamin D status, specifically those residing in countries of higher latitude (such as the United Kingdom).
- Trial name
- D-BIICEP (NCT03253055)
- Testing
- DEXA, pQCT, Lifestyle Questionnaire
- Where
- 2 sites in United Kingdom
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- University of Surrey
Vitamin C Deficiency
The Effect of Liposome Vitamin C on the Absorption and Metabolism of the Human Body.
To evaluate the difference between vitamin C in the form of oral liposomes and general vitamin C in a fixed period of time in plasma and urine.
- Trial name
- NCT04886752
- Testing
- vitamin C without liposome, liposomal process A vitamin C, liposomal process B vitamin C (Double Nutri™)
- Where
- Taiwan
- Volunteers
- 11 people, healthy volunteers welcome
- Sponsor
- TCI Co., Ltd.
Hypertension
Effect of a Nitric Oxide Supplementation Product on Endothelial Dysfunction and Prehypertensive Adults
The nitric oxide supplementation product, Neo40 Daily®, provides a dietary source of No2-. The product also allows for robust No2-reduction to NO from the extremely potent nitrite-reducing capacity of the polyphenols found in…
- Trial name
- NCT03895749
- Testing
- NEO40 Daily
- Where
- United States
- Volunteers
- 42 people, healthy volunteers welcome
- Sponsor
- Hypertension Institute, Nashville
Skin Darken
Improved Skin Whitening Outcomes Associated With Nicotinamide Fortified Consumption in 30 to 50- Year-old Women
The goal of this clinical trial is to study whether the products with nicotinamide fortified could improve skin whitening in 30 to 50-year-old women.
- Trial name
- NCT05696938
- Testing
- Wonderlab Nicotinamide Drink, Ordinary Drink
- Where
- 2 sites in China
- Volunteers
- 70 people, healthy volunteers welcome
- Sponsor
- Shenzhen Precision Health Food Technology Co. Ltd.,
Pregnancy
Maternal Vitamin D for Infant Growth (MDIG) Trial
The primary aims of this study are: 1) to determine whether maternal prenatal vitamin D3 supplementation (4200 IU/week, 16,800 IU/week, or 28,000 IU/week) versus placebo increases or decreases infant length at 1 year of age, and…
- Trial name
- MDIG (NCT01924013)
- Testing
- Vitamin D3 (cholecalciferol)
- Where
- Bangladesh
- Volunteers
- 1,300 people, healthy volunteers welcome
- Sponsor
- The Hospital for Sick Children