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
- NCT06757244RecruitingPhase 2
Dovipa: Immunotherapy and vitamin D with chemo for advanced pancreatic cancer
This trial tests whether combining the immunotherapy dostarlimab with vitamin D3 and standard chemotherapy (mFOLFIRINOX) can help people with stage IV pancreatic cancer. It aims to see if this new approach is safe and effective.
MarseilleAges 18–75 - NCT06772220Recruiting
Homocysteine management for Parkinson's patients on levodopa
This trial tests whether controlling homocysteine levels can help people with Parkinson's disease who are taking levodopa. You may qualify if you take at least 300 mg of levodopa per day, are between 40 and 90 years old, and have no major kidney problems or uncontrolled high blood pressure.
Portland, OregonAges 40–90 - 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+ - 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 - NCT06847373Recruiting
Vitamin D for teens with obesity
This study is testing whether vitamin D supplements can help teens with obesity. It is open to participants aged 10 to 18 who live in Mexico City and have obesity based on their BMI.
MéxicoAges 10–18 - NCT06881628RecruitingPhase 4
Tranexamic acid and vitamin K for bleeding in cirrhosis
This trial tests if giving tranexamic acid and vitamin K by injection can help control bleeding from the upper digestive tract in people with liver cirrhosis. It may offer a way to stop bleeding more quickly.
Tanta, GharbyeaAges 18 years+ - NCT06885827Recruiting
Vitamin mix for people with glaucoma
This trial tests whether taking a daily mix of B vitamins (B6, B9, B12) and choline can help slow vision loss in people with certain types of glaucoma. You would take the vitamins or a placebo (inactive pill) for up to 2 years.
Stockholm, Stockholm CountyAges 18 years+ - NCT06915701RecruitingPhase 2/Phase 3
Vitamin E for rheumatoid arthritis inflammation
This study tests whether adding vitamin E to standard rheumatoid arthritis treatment can reduce inflammation and disease activity. It is designed for women with early RA who are not getting enough vitamin E from their diet.
Guadalajara, JaliscoAges 18 years+ - NCT07057362Recruiting
Vitamin D and blood pressure during C-section under spinal anesthesia
This trial checks if low vitamin D levels can make a drop in blood pressure more likely or severe during a C-section with spinal anesthesia. It may help find ways to better monitor or prevent blood pressure problems during surgery.
Düzce, MerkezAges 18–40 - NCT07084597Recruiting
Vitamin D3 for Heart Health in Parkinson's Men
This study tests whether taking vitamin D3 supplements can improve the nerve function that controls your heartbeat in men with Parkinson's disease who have low vitamin D levels. If you have mild to moderate Parkinson's and are on levodopa, this trial may help understand if vitamin D can support your heart health.
Dhaka, ShahbagAges 51–70 - NCT07085598Recruiting
Vitamin D3 for heart nerve health in men with epilepsy
This study tests whether taking vitamin D3 supplements can improve how well the nerves controlling your heart work in men with epilepsy who have low vitamin D levels. If you have low vitamin D from taking certain epilepsy medicines, this trial may help understand if vitamin D can support your heart health.
Dhaka, ShahbagAges 20–40 - NCT07096414Recruiting
Vitamin D3 and brain waves in men with epilepsy and low vitamin D
This trial tests whether taking vitamin D3 supplements changes brain wave activity in men with epilepsy who also have low vitamin D levels. It aims to see if vitamin D could help improve brain function.
Dhaka, Shahbag, DhakaAges 20–40 - NCT07115342Recruiting
Probiotics and vitamin D for hay fever relief
This study tests whether taking a combination of probiotics (good bacteria) and vitamin D can help reduce hay fever symptoms. It may be a good option if your vitamin D is low and you haven't used probiotics recently.
Tanta, Gharbia GovernorateAges 18–65 - NCT07206537Recruiting
Vitamin K2 to prevent steroid bone loss in children
This study tests whether vitamin K2 can help prevent bone loss caused by steroid treatment in children with nephrotic syndrome. If your child meets the requirements, taking vitamin K2 may protect their bones while they receive steroids.
CairoAges 1–16 - NCT07241585Recruiting
Vitamin D and light therapy for skin cancer
This trial tests whether taking vitamin D before a special light therapy (photodynamic therapy) can help your body fight nonmelanoma skin cancers like basal or squamous cell cancer. You may join if you are scheduled for surgery to remove a skin tumor.
Cleveland, OhioAges 18 years+ - NCT07269223Recruiting
Oral vitamin D3 for inflammation in ulcerative colitis
This study tests whether taking vitamin D3 by mouth can reduce inflammation in people with moderate ulcerative colitis and low vitamin D levels. It may help if you have a confirmed diagnosis and are between 20–40 years old.
Lahore, Punjab ProvinceAges 20–40 - NCT07269457RecruitingPhase 2
Vitamin D3 for recovery after mild to moderate brain injury
This trial tests if taking vitamin D3 can help reduce swelling and speed up recovery after a mild to moderate traumatic brain injury. It is for people who have low vitamin D levels.
LagosAges 18–65 - NCT07293910RecruitingPhase 2
Comparing treatments for H. pylori infection
This trial tests whether a new type of acid-reducing drug (vonoprazan) works better than a common one (proton pump inhibitor) when combined with vitamin D or probiotics to clear H. pylori, a bacteria that can cause stomach problems. If you have H. pylori and haven't been treated for it before, this study may be for you.
TantaAges 18–80 - NCT07300332Recruiting
Exercise training and vitamin D study
This trial tests whether exercise affects how your body uses vitamin D. It might help if you have a higher BMI and do not take certain medications or supplements.
Trikala, KaryesAges 35–50 - 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 - NCT01793168Recruiting
Rare disease registry and history study
This study keeps a registry (a structured list) of people with rare diseases and may also track how the condition changes over time. It can help researchers better understand rare illnesses and find gaps in care, which may improve future treatments.
Sioux Falls, South DakotaAges Any age - 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+ - NCT07119996RecruitingPhase 1
Vitamin B3 to boost immunotherapy for bladder cancer
This trial tests whether taking vitamin B3 can help immunotherapy work better for people with bladder cancer. It’s for patients who have a certain type of bladder cancer and have had a recent infection that needed antibiotics.
Guangzhou, GuangdongAges 18 years+ - NCT02172651RecruitingEarly Phase 1
Vitamin D during early colon cancer or liver surgery
This trial studies whether taking higher-dose vitamin D3 around the time of colon cancer (or colon cancer with resectable liver metastases) surgery improves outcomes. It focuses on safety and possible effects on cancer-related health after surgery.
Boston, MassachusettsAges 18 years+
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.