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
- NCT07400757Recruiting
Statin and vitamin D for active thyroid eye disease
This trial tests whether a statin (a cholesterol-lowering medicine) combined with vitamin D can improve active thyroid eye disease. It may help if you have both eye inflammation and high cholesterol.
Taipei, TaiwanAges 20 years+ - NCT07435935Recruiting
Vitamin D deficiency and balance study
This study looks at how vitamin D deficiency affects your body's ability to maintain balance and control posture. It may help explain why low vitamin D can impact muscle and bone health.
IstanbulAges 20–40 - NCT07455656Recruiting
Vitamin D3 or gum massage for faster canine movement with braces
This study tests whether applying vitamin D3 or a special gum massage (corticision) next to the teeth can help move your eye teeth (canines) faster after your upper first premolars are removed for braces. It is for teenagers or young adults who already need that extraction as part of their orthodontic plan.
Cairo, Cairo GovernorateAges 13–20 - NCT07458815Recruiting
Vitamin D for stroke recovery after brain bleed
This trial tests whether vitamin D supplements can help people recover after a specific type of stroke (intracerebral hemorrhage). It is for adults who had a moderate-sized bleed in the upper part of the brain within the last 4 days and were otherwise independent before the stroke.
Hong KongAges 18–90 - NCT07491965Recruiting
Vitamin D and Benign Paroxysmal Positional Vertigo (BPPV)
This study looks at whether people with BPPV (a type of vertigo triggered by head movement) have lower vitamin D levels than those who don't have vertigo. Your participation may help clarify if vitamin D plays a role in BPPV.
SohagAges Any age - 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+ - NCT07647198RecruitingPhase 2
Green tea extract and vitamin D to prevent fibroid return
This study tests whether two natural supplements—green tea extract (EGCG) and vitamin D—can help prevent uterine fibroids from coming back after treatment. You would take these supplements for 12 months while avoiding pregnancy.
Abu Dhabi, United Arab Emirates (uae)Ages 18 years+ - NCT07648706Recruiting
Vitamin D supplements to prevent pregnancy complications
This study tests whether vitamin D supplements can help prevent preeclampsia (a serious pregnancy condition with high blood pressure) in women with low vitamin D levels. You would take vitamin D pills during pregnancy and be monitored to see if this reduces your risk.
Sanaa, Maeen DistrictAges 18–40 - NCT07654777Recruiting
Vitamin D for better performance in healthy adults
This study tests if taking vitamin D supplements can help young, healthy adults stay sharp and perform well under stress. You may be eligible if your current vitamin D level is low but not severely low.
Silver Spring, MarylandAges 18–40 - NCT07579078Enrolling by invitation
Vitamin D and Brain Activity in Women With Depression
This study tests whether vitamin D supplements can improve brain wave patterns in women diagnosed with depression who have low vitamin D levels. Researchers will measure brain activity using EEG (a non-invasive test that records electrical signals from the brain) before and after vitamin D treatment.
DhakaAges 20–40 - 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+ - NCT06745817Enrolling by invitation
Nutrition study for women of childbearing age
This study looks at how well women in their reproductive years get enough nutrients from their diet. It will compare the nutrition of women who eat a regular diet, a vegetarian diet, or a vegan diet.
LjubljanaAges 20–49 - NCT06649825Enrolling by invitation
Vitamin B1 for familial adenomatous polyposis
This trial tests whether taking vitamin B1 can help people with familial adenomatous polyposis (FAP) reduce the number of polyps in their colon or rectum. It is designed for people who still have most of their bowel and have more than 10 polyps.
Shanghai, Shanghai MunicipalityAges 18–80 - NCT05839938Enrolling by invitation
Vitamin D study for kids with allergic conjunctivitis
This trial studies whether vitamin D affects the surface of the eye, the eye’s normal germs, eye inflammation, and vision in children with allergic conjunctivitis. If vitamin D helps, it could improve symptoms and eye comfort.
TaichungAges 6–18 - NCT07757477Recruiting
Sunlight for vitamin D in kids with cerebral palsy
This study tests whether sunlight exposure can help raise vitamin D levels in young children with cerebral palsy. It aims to see if more sunlight can improve their health and well-being.
Jakarta Pusat, DKI JakartaAges 1–5 - NCT04715022RecruitingTeam says not enrollingPhase 1/Phase 2
Vitamin C study for insulin resistance in obesity
This early-stage study tests whether vitamin C (and possibly how your body uses it) affects blood vessel function in people with obesity and insulin resistance. You may be asked to stop certain supplements before starting so researchers can measure the effect more clearly.
Kansas City, KansasAges 35–65 - NCT07750379Recruiting
Acid-reducing medicine for aspiration in children with laryngomalacia
This study tests whether giving a common acid-reducing medicine (a proton pump inhibitor) to children with laryngomalacia can reduce choking and aspiration. It may help if your child has frequent choking episodes.
Minya, Minya GovernorateAges 6 months–5 years - NCT06794047Recruiting
Vitamin C for IVF in women with low ovarian reserve
This study tests whether taking Vitamin C can improve IVF outcomes for women with low ovarian reserve (DOR). If you are starting your first or second IVF cycle and meet certain health criteria, you may be eligible.
Beijing, Beijing MunicipalityAges 20–45 - NCT05407194Recruiting
Collagen and vitamin C for jumper’s knee pain
This trial tests whether taking collagen plus vitamin C can improve “jumper’s knee” pain in active teens and young adults. It compares a supplement plan to see if symptoms and sports ability improve over time.
Ede, GelderlandAges 16–40 - NCT05283174Recruiting
Blood thinner use during stroke to predict outcomes
This study looks at how people doing well on certain blood thinners do when they have a stroke or bleeding while taking them. It will measure medication levels in your blood to understand stroke severity and recovery in the short and long term.
TaipeiAges 20 years+ - NCT05175300Recruiting
Vitamin E hip implant for young, active hip replacements
This study tests a hip replacement implant that uses Vitamin E–doped material to see how well it works for young, active adults. It’s meant for people who need a total hip replacement, and compares outcomes over follow-up visits.
LyonAges 18–65 - NCT04284839RecruitingPhase 3
Blood thinner pills vs warfarin after heart surgery
This trial compares two ways to prevent blood clots after open heart surgery: a “direct oral” blood thinner pill versus warfarin (a vitamin K antagonist). It may help find the safest and most effective option for people who develop atrial fibrillation after surgery.
Fitzroy, VictoriaAges 18 years+ - NCT03849443RecruitingEarly Phase 1
Testing tranexamic acid to reduce bleeding after spine fusion
This trial studies whether a single dose or multiple doses of tranexamic acid (TXA) can reduce the chance you need a blood transfusion after spine fusion surgery. It also compares two different ways TXA may be given (by mouth and through a vein) to see which approach works best and is safe.
Chicago, IllinoisAges 18 years+ - NCT07153302Recruiting
Can almonds help heal broken leg bones?
This study tests if eating almonds can help femur (thigh) or tibia (shin) fractures heal faster. If you have a fresh leg break and are 18 to 55, you may be able to join.
KarachiAges 18–55
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.