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Vitamin C clinical trials and research
As of November 12, 2026, Find a Trial lists 3 Vitamin C clinical trials that are recruiting, at sites in 3 countries (most in China (1), Pakistan (1), Egypt (1)). By phase: Phase 1 (1), Phase 4 (1), Phase 2 (1). Every study is explained in plain English. Data from ClinicalTrials.gov and NIH RePORTER, updated November 12, 2026.
- 3Clinical trials
- 3Countries
Newest Vitamin C clinical trials
| Study | Phase | Where | Status | Registered |
|---|---|---|---|---|
| Gingival Depigmentation with Vitamin C and Glutathione vs. Surgical Depigmentation | Phase 2 | Al Fayyum, Faiyum Governorate | Recruiting | May 19, 2026 |
| Vitamin C to shorten hospital stay for children with severe pneumonia | Phase 4 | Multan Khurd, Punjab Province | Recruiting | Feb 17, 2026 |
| High-dose intravenous vitamin C dosed by how the body clears it for people with advanced solid tumors | Phase 1 | Wuhan, Hubei | Recruiting | Aug 13, 2025 |
All recruiting trials (3)
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Gingival Depigmentation with Vitamin C and Glutathione vs. Surgical Depigmentation
This study tests whether vitamin C with glutathione injections can depigment pigmented gums as effectively as surgical depigmentation in adults.
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Vitamin C to shorten hospital stay for children with severe pneumonia
This trial will test whether giving vitamin C along with usual treatment helps children under five with severe pneumonia get better faster and leave the hospital sooner.
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High-dose intravenous vitamin C dosed by how the body clears it for people with advanced solid tumors
This trial tests whether giving high-dose IV vitamin C based on each patient's pharmacokinetics can be delivered safely and produce anti-tumor effects in adults with advanced or metastatic solid tumors.
Related topics
Quick answers
How many Vitamin C clinical trials are recruiting right now?
3, as of November 12, 2026. We update this list each time we refresh our data from ClinicalTrials.gov.
Where are these trials running?
In 3 countries. The most sites are in China (1 trial), Pakistan (1 trial), Egypt (1 trial). Each study page lists its sites and which ones are recruiting.
What phases are they in?
Phase 1: 1, Phase 4: 1, Phase 2: 1. Trials with no phase listed are usually device, behavioural or observational studies.
How do I join one?
Open a study, check the "Is this trial a fit for you?" section, then contact the study team listed on the page. They will ask a few screening questions. Asking is free and does not commit you to anything. Talk it over with your doctor first.
Find the studies that fit you
A list is a starting point. Tell us your situation in your own words and we'll rank the studies that match and explain why. It's free and needs no account.