Treatment
Vitamin A clinical trials
We’re tracking 254 recruiting studies that include Vitamin A, each written for real people, not researchers, below.
Recruiting studies
- NCT06508099RecruitingPhase 2
Vitamin A and D supplements after stem cell transplant
This trial tests whether taking vitamin A and D after a stem cell transplant can help improve recovery. It is for people with certain blood cancers who have a matched donor and are in remission or have low disease activity.
Saint PetersburgAges 18 years+ - NCT05937789Recruiting
Vitamin D3 during early ICU care to help critically ill adults
This trial tests whether starting vitamin D3 soon after ICU admission helps critically ill adults with low vitamin D levels. It may help correct low vitamin D and possibly improve recovery, depending on your health situation.
TaipeiAges 18 years+ - NCT07743918Recruiting
Vitamin D and outcomes in locally advanced cervical cancer
This study looks at how vitamin D levels affect treatment results in women with locally advanced cervical cancer who are about to start chemoradiation (chemotherapy plus radiation). It aims to see if higher vitamin D is linked to better outcomes.
Kragujevac, ŠumadijaAges 18–80 - 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 - NCT07636733Recruiting
Vitamin D for Gum and Bone Health in Periodontal Disease
This study tests whether vitamin D supplements can reduce inflammation and improve healing in people with gum disease, ranging from mild gingivitis to advanced periodontitis. Researchers will compare how vitamin D affects different stages of gum disease.
RizeAges 18–70 - NCT07592975Recruiting
Food with Fiber and B-Vitamins for Gut Health in Older Adults
This study tests whether adding special fibers (prebiotics) and B-vitamins to food can improve your gut bacteria, reduce inflammation, and support mental health. You'll eat fortified foods for several weeks while researchers track changes in your digestion and wellbeing.
Coleraine, County LondonderryAges 50 years+ - 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 - NCT06642428Recruiting
Vitamin D for breast cancer treatment before surgery
This trial tests whether taking vitamin D pills during chemotherapy or targeted therapy (before breast cancer surgery) can improve how well the treatment works and reduce side effects. It is for women with low vitamin D levels.
Xining, QinghaiAges 18–80 - NCT06642441Recruiting
Vitamin D for reducing chemotherapy side effects in breast cancer
This trial tests whether taking vitamin D supplements can reduce side effects from chemotherapy in people with breast cancer. It is for patients with low vitamin D levels who are about to start their first chemotherapy treatment.
Xining, QinghaiAges 18–80 - 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 - NCT03989778RecruitingPhase 2
Vitamin D for PCOS with low vitamin D
This Phase 2 study tests whether vitamin D can improve hormone balance and infertility-related problems in people with PCOS who have low vitamin D. You may be able to join if you’re between 18 and 36, have primary infertility, and meet specific PCOS and vitamin D blood test levels.
Karachi, SindhAges 18–36 - 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 - NCT04331639Recruiting
High-dose vitamin D for kids with IBD on biologic therapy
This trial studies whether giving a higher dose of vitamin D3 helps children and teens with inflammatory bowel disease (Crohn’s or ulcerative colitis) who have low vitamin D levels. Participants are already on biologic medicines and will be treated while monitoring blood (and safety) related to vitamin D.
Boston, MassachusettsAges 5–25 - NCT07335991Recruiting
Vitamin A for children with scoliosis and low vitamin A
This trial tests whether vitamin A supplements can help children with idiopathic scoliosis (a spinal curve with no known cause) who also have low vitamin A levels. It aims to see if correcting the deficiency can improve the spine curve or slow its progression.
Wenzhou, ZhejiangAges 6–15 - NCT07341789Enrolling by invitation
Vitamin B12 and orange extract for better performance
This study tests whether vitamin B12, natural orange extract, or both together can improve your physical and mental performance. It is for healthy men who exercise regularly and eat citrus fruits.
La Ñora, MurciaAges 18–45 - NCT06172764RecruitingPhase 4
Vitamin D for early cavities: a saliva study
This study tests whether vitamin D supplements can help improve the health of your mouth by looking at changes in saliva and the bacteria that cause cavities. If you have early cavities and low vitamin D, you may be able to join.
Karachi, SindhAges 12–50 - NCT07317830Recruiting
Comparing vitamin D3 forms for low vitamin D
This study compares different forms of vitamin D3 to find which works best for adults with low vitamin D levels. If you have a vitamin D deficiency and are generally healthy, this trial may help determine the most effective supplement for you.
BelgradeAges 18–80 - NCT06867952Recruiting
Vitamin K2 for bone loss with a specific gene change
This study tests whether taking vitamin K2 can help people with low bone density (osteopenia or osteoporosis) who have a specific change in the VDR gene. If you have this gene change, vitamin K2 may work better for you than standard supplements.
NovosibirskAges 40–75 - NCT07288801RecruitingPhase 4
Vitamin D to prevent preeclampsia again in pregnancy
This trial tests whether taking vitamin D can help pregnant women who had preeclampsia before avoid getting it again. It may protect both you and your baby.
Multan, Punjab ProvinceAges 20–45 - NCT07268742Recruiting
Vitamin D and steroids in endocrine disorders
This study looks at how vitamin D and steroids work in people with different hormone-related conditions. It may help us understand why some people have trouble with vitamin D and how it affects their health.
LeuvenAges 18 years+ - 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 - NCT07096336Recruiting
Vitamin D3 and brain waves in Parkinson's study
This study tests whether taking vitamin D3 can improve brain wave patterns in men with Parkinson's disease who have low vitamin D levels. It may help understand if vitamin D supports brain health.
Dhaka, ShahbagAges 51–70 - NCT07053657Recruiting
Vitamin D for heart health in overweight teens
This study looks at whether giving vitamin D can improve heart and metabolic health in overweight or obese teens who have low vitamin D levels. It may help lower risks like high blood sugar or cholesterol.
Anqing, AnhuiAges 10–16 - NCT07048860Recruiting
Pilot study: intense exercise and coaching for older adults with weight and memory concerns
This pilot study tests a program to help older adults who are overweight, sedentary, and have mild memory changes. The goal is to see if intense, supervised physical activity and lifestyle coaching can improve mobility and thinking.
ToulouseAges 65–85
Common questions
- Are there clinical trials studying Vitamin A?
- Yes. Clin2 currently lists 254 recruiting studies that include Vitamin A, 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 A 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 A 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 A 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.