Treatment
Vitamin C clinical trials
We’re tracking 51 recruiting studies that include Vitamin C, each written for real people, not researchers, below.
Recruiting studies
- NCT07513727Recruiting
Vitamin C Treatment for Dark Gum Pigmentation
This study tests whether vitamin C can safely lighten dark spots or patches on your gums that are caused by natural pigmentation. If you're bothered by how these dark areas look, this trial may help improve your smile's appearance.
Cairo, Cario GovernorateAges 20–40 - NCT07151105Recruiting
Vitamin C for gut health in adults with obesity
This trial tests whether taking vitamin C supplements helps improve gut barrier function in adults with obesity. You'll follow a low-fruit-and-vegetable diet for two, two-week periods.
Columbus, OhioAges 18–50 - NCT06009744Recruiting
Vitamin C and zinc for treating bowel leaks
This trial tests whether high doses of vitamin C and zinc can help heal a type of bowel leak (enterocutaneous fistula) in people who need nutrition through a vein. It might help reduce the output from the fistula and speed up recovery.
Mexico City, Mexico CityAges 18–70 - NCT06749756Recruiting
Vitamins B6, B12 and C for sepsis
This trial tests whether a combination of vitamins B6, B12, and C can help improve blood flow in tiny blood vessels (microcirculation) for people with sepsis. It may help your body recover better from severe infection.
Chengdu, SichuanAges 18–85 - NCT06983847Recruiting
Long-term study of Vitamin-C Injektopas in vitamin C deficiency
This study observes patients with vitamin C deficiency who receive Vitamin-C Injektopas 7.5 g over time to understand how it is used and its effects. It may help if you have low vitamin C levels.
Vienna, Etc., AustriaAges 18–120 - NCT07121036RecruitingPhase 1
High-dose vitamin C infusion for advanced solid tumors
This trial tests a special high-dose vitamin C infusion, given based on how your body processes it, for people with advanced solid tumors. It aims to see if this vitamin C therapy can be safely combined with your current or new chemotherapy to help control the cancer.
Wuhan, HubeiAges 18–75 - NCT02735707RecruitingPhase 3
Adaptive trial for severe pneumonia care in intensive care
This study tests ways to improve treatment for adults with severe pneumonia that lands them in the ICU, adjusting the plan as results come in. It may help your care team find better treatments for lung infection and breathing/heart support needs.
Jacksonville, FloridaAges 18 years+ - NCT07414693RecruitingPhase 4
Vitamin C for kids with severe pneumonia
This trial tests if giving vitamin C to children hospitalized with severe pneumonia can help them get better faster and leave the hospital sooner. It may be an option for children who have had pneumonia symptoms for 48 hours or less.
Multan Khurd, Punjab ProvinceAges 2 months–4.9 years - NCT07388121Recruiting
Vitamin C and gut health in healthy adults
This trial tests whether taking vitamin C supplements changes the bacteria in your gut and how well your gut works. If you are a healthy adult, you may be able to join.
GlasgowAges 18–65 - NCT07677826Recruiting
Q10 and Vitamin C for Gum Lightening
This trial tests whether applying coenzyme Q10 and vitamin C, alone or together, after a gum lightening procedure can improve results. It may help if you have dark gums and want a safer, more effective treatment.
NāşirAges 18–45 - NCT07595705RecruitingPhase 2
Testing gum pigmentation removal treatments
This study tests treatments to lighten dark spots or patches on your gums for cosmetic reasons. If you have visible brown or black discoloration on your gums and are interested in a minor procedure to improve their appearance, this trial may be for you.
Al Fayyum, Faiyum GovernorateAges 18 years+ - NCT05817851RecruitingPhase 2
Vitamin C by vein after cardiac arrest shock
This Phase 2 study tests whether early high-dose vitamin C given through a vein can improve outcomes for people who remain unconscious after an out-of-hospital cardiac arrest with shock. It may help by supporting recovery during the time when the body is under severe stress.
AmiensAges 18 years+ - NCT06306183Recruiting
Vitamin C for pain relief after an ER visit
This trial tests whether a high dose of vitamin C can help reduce pain for people who come to the emergency department with new muscle or bone pain. If you qualify, you will receive vitamin C or a placebo and track your pain over time.
Ottawa, OntarioAges 18 years+ - NCT06206759Recruiting
Vitamin C for triglyceride levels in ICU patients
This trial looks at whether giving vitamin C through an IV can help lower triglyceride levels in patients in the intensive care unit. It compares patients who received vitamin C with similar patients who did not.
Kfar SabaAges 18–99 - NCT06794255Recruiting
Vitamin C for healthy aging in middle-aged adults
This study looks at whether vitamin C can help support healthy aging in middle-aged and older adults. It will compare taking vitamin C to a placebo (a dummy pill) to see if it improves overall health.
Nanchang, JiangxiAges 18–70 - NCT06354582RecruitingPhase 4
Vitamin C to prevent fever after epidural in labor
This trial tests whether giving vitamin C through an IV during labor can help prevent fever that sometimes happens after getting an epidural. If you are having a single baby vaginally, at full term, and plan to use an epidural, this study may be for you.
Zhengzhou, HenanAges 18–35 - NCT07379216Recruiting
Vitamin C and glutathione drink for skin health
This study tests a liquid supplement containing vitamin C and glutathione to see if it benefits skin health. It may be a good fit if you are a healthy adult looking to improve your skin without using other skin products during the study.
Pingtung CityAges 18–65 - NCT05555576Recruiting
Vitamin C to reduce opioid use after an ER visit
This trial tests whether taking vitamin C after an emergency room visit for a new, short-term muscle or joint pain can lower how many opioid pain pills you use. It may help by reducing opioid consumption while you recover.
Montreal, QuebecAges 18 years+ - NCT07335432Enrolling by invitation
Vitamin C to reduce blood loss during hysterectomy
This trial tests whether giving vitamin C through a vein before surgery can reduce blood loss during a total abdominal hysterectomy. If you are having this surgery and do not have bleeding problems or other exclusions, this study may help determine a way to make the procedure safer.
Si Racha, Changwat Chon BuriAges 20 years+ - NCT06123715RecruitingPhase 2
Vitamin C to reduce pain after knee replacement
This study tests whether taking vitamin C before and after knee replacement surgery can reduce long-term pain. You may be eligible if you are having knee replacement for osteoarthritis and are generally healthy.
Toronto, OntarioAges 18 years+ - NCT06781970Recruiting
Vitamin C for eye cell protection during cataract surgery
This trial tests whether taking vitamin C before and after cataract surgery can help protect the inner layer of the eye. It is for people aged 60 or older with hard, age-related cataracts who are having phacoemulsification surgery.
Jakarta, DKI JakartaAges 60 years+ - NCT06569264Recruiting
Comparing socket preservation methods after tooth extraction
This trial tests two different treatments to preserve the bone and gum after a tooth is removed. It compares using a dentin graft with I-PRF (a special blood concentrate) to the same treatment with added vitamin C. The goal is to see which helps the healing better before a dental implant.
CairoAges 18–65 - NCT06336902RecruitingPhase 1
Immunotherapy plus fasting diet and vitamin C for KRAS-mutated colorectal cancer
This trial tests a combination of two immunotherapy drugs (botensilimab and balstilimab) plus a fasting-mimicking diet and high-dose vitamin C for people with a specific type of advanced colorectal cancer (KRAS-mutated). It aims to see if this approach can help when standard treatments have stopped working.
Fullerton, CaliforniaAges 18 years+ - NCT02966665RecruitingPhase 1
Testing blood vessel function in people of different health conditions
This early study measures how well your blood vessels work using tests that may include MRI. It compares healthy people with people who have conditions like COPD, pulmonary arterial hypertension, heart failure, or high blood pressure, to better understand “vascular function” in health and disease.
Salt Lake City, UtahAges 18 years+
What Vitamin C is being studied for
Conditions with recruiting Vitamin C studies.
Common questions
- Are there clinical trials studying Vitamin C?
- Yes. Clin2 currently lists 51 recruiting studies that include Vitamin C, drawn from the U.S. registry and rewritten for real people so you can see what each is testing and who it's for.
- How do I know if I qualify for a Vitamin C trial?
- Each study lists its own eligibility criteria — rules about condition, age, and prior treatments. On every Clin2 trial page we explain these in plain language and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Is Vitamin C an approved treatment?
- A drug being studied in a trial may be investigational (still being tested) or already approved and being studied for a new use. Each study page explains what phase it's in. Clin2 does not provide medical advice — talk with your doctor about whether Vitamin C or a specific trial is right for you.
Related treatments
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. A drug appearing here is being studied in a trial and may be investigational. Talk with your doctor about whether a specific treatment or trial is right for you.