Treatment
Vitamin A clinical trials
We’re tracking 274 recruiting studies that include Vitamin A, each written for real people, not researchers, below.
Recruiting studies
- NCT05846880RecruitingEarly Phase 1
Vitamin D3 supplement for people with multiple myeloma
This early-phase study tests whether taking a Vitamin D3 supplement can be safe and helpful for people with symptomatic multiple myeloma. It may help researchers understand how Vitamin D affects the disease and how patients tolerate treatment.
Augusta, GeorgiaAges 18 years+ - NCT05860270RecruitingPhase 4
Vitamin D by mouth to prevent peritoneal dialysis peritonitis
This trial tests whether taking vitamin D by mouth can lower the risk of peritonitis (a painful infection of the lining around the abdomen) in people on peritoneal dialysis. You might benefit if your vitamin D level is low and you meet other safety requirements.
Beijing, Beijing MunicipalityAges 19 years+ - NCT05877846Recruiting
Personalized care to improve physical function in older adults
This study looks at precision (personalized) approaches to help older adults improve physical function. It may include giving a specific supplement depending on lab results, and it requires regular study visits and ability to complete procedures.
Chapel Hill, North CarolinaAges 65–85 - NCT05942053RecruitingPhase 4
Vitamin K2 for chronic kidney disease with high urine protein
This trial studies whether vitamin K2 can help people with chronic kidney disease (kidney damage that lasts months or longer), especially those with higher protein levels in the urine. It compares vitamin K2 use in a specific group and watches kidney-related health outcomes and safety.
Tanta, Capital of Gharbia Governorate.Ages 18 years+ - NCT06106646Recruiting
Vitamin C and smoking in pregnancy: long-term lung health follow-up
This study is checking on the long-term lung health of children whose mothers took vitamin C or a placebo during pregnancy and either smoked or did not smoke. It's a follow-up to see if vitamin C might have lasting benefits for their breathing.
Indianapolis, IndianaAges 6–16 - 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+ - NCT06138249Recruiting
Vitamin D supplements for low vitamin D levels
This trial tests two forms of vitamin D (cholecalciferol and calcifediol) to see which better raises vitamin D levels in people with a deficiency. It may help you if your vitamin D is low, but you don't have osteoporosis or liver/kidney problems.
BariAges 18–80 - NCT06201013Recruiting
Vitamin D for children with wet overactive bladder
This trial tests whether giving vitamin D to children with 'wet' overactive bladder (OAB) – where they leak urine with sudden urges – can help improve symptoms. It's for children aged 5 and older who have low vitamin D levels and no other serious health conditions.
Chongqing, Chongqing MunicipalityAges 5–18 - 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 - 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+ - 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+ - 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 - NCT06446830Recruiting
Vitamin B complex for pain relief after cesarean in ICU
This trial tests whether adding vitamin B complex to standard pain medicine can improve pain control after a cesarean section in critically ill women. It aims to find a safer, effective way to manage pain without relying too much on strong opioids.
Cairo, EgyptAges Any age - NCT06481111Recruiting
Vitamin D treatment registry at San Raffaele
This study is tracking men and women of any age who are taking vitamin D supplements. It aims to learn more about how vitamin D treatment works in real life.
MilanAges 18 years+ - NCT06512441Recruiting
Vitamin B6 for inflammatory bowel disease
This study tests whether vitamin B6 can help treat inflammatory bowel disease (IBD). It may offer a simple, low-cost option to support your current treatment.
Shanghai, Shanghai MunicipalityAges 18–75 - NCT06512701Recruiting
Fat-soluble vitamins and fatty liver disease study
This study looks at how fat-soluble vitamins (like vitamins A, D, E, and K) are related to non-alcoholic fatty liver disease (NAFLD). It may help understand if vitamin levels affect your liver health.
Hangzhou, ZhejiangAges 18 years+ - NCT06512688Recruiting
Fat-Soluble Vitamin Levels in Healthy Chinese Adults
This study is measuring the normal levels of fat-soluble vitamins (like vitamins A, D, E, and K) in the blood of healthy Chinese adults. It helps doctors understand what healthy vitamin levels look like.
Hangzhou, ZhejiangAges 18 years+ - NCT06551337RecruitingPhase 4
Vitamin D for bronchiectasis patients
This trial tests if taking vitamin D can help people with bronchiectasis have fewer flare-ups. It is only for patients who were in an earlier study that checked their vitamin D levels.
Hong KongAges 18 years+ - NCT06571344Recruiting
Vitamin D in dialysis patients
This trial checks if measuring vitamin D in dialysis patients can lead to better treatment, then gives vitamin D supplements to those who are low. It may help improve your bone and heart health.
GdanskAges 18 years+ - NCT06639789Recruiting
Vitamin B12 effect on cycling performance
This trial tests a new Vitamin B12 supplement to see if it improves physical and mental performance in cyclists. It might help if you are a healthy male cyclist training regularly.
La Ñora, MurciaAges 18–45 - NCT07684404Recruiting
Vitamin D for dental implant success
This trial tests if taking vitamin D improves how well dental implants bond with the jawbone in people with low vitamin D levels. It may help strengthen the implant integration.
Cairo, New CairoAges 20–60 - NCT06445933Recruiting
Vitamin B6 for depression in pregnancy and after birth
This trial tests whether taking Vitamin B6 can help prevent depression in pregnant women and new mothers. If you are between 24 and 28 weeks pregnant and have no history of mental health conditions, you may be able to join.
TaipeiAges 20–50 - NCT06708741RecruitingPhase 3
Vitamin D maintenance after surgery
This trial tests whether taking vitamin D supplements after surgery can help maintain healthy vitamin D levels. It may be a good fit if you are between 21 and 65, had surgery, and are willing to take vitamin D and have your levels checked.
Singapore, SingaporeAges 21–65 - NCT06736002Recruiting
Vitamin D for epilepsy: fewer seizures, less fatigue
This trial tests whether high doses of vitamin D can help reduce seizures and improve fatigue and quality of life in adults with refractory epilepsy who have not responded well to at least two medications.
TainanAges Any age
Common questions
- Are there clinical trials studying Vitamin A?
- Yes. Clin2 currently lists 274 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.