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
- NCT05366933RecruitingPhase 1
B-Complex vitamins to protect astronauts during long space missions
This early study tests whether a B-vitamin supplement (called B-Complex) can act as a helpful countermeasure during long stays on the International Space Station. It is only for astronauts assigned to specific 6–12 month missions.
Houston, TexasAges 20–100 - NCT07050693Recruiting
Can a breast-milk sugar supplement prevent colds and stomach bugs?
This study tests a chewable supplement made from a natural sugar found in breast milk (2'-fucosyllactose) to see if it helps prevent colds and stomach bugs in young children who attend daycare or school. It is for healthy children between 1 and 4 years old.
Bari, BariAges 1–4 - NCT04715022RecruitingPhase 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 - NCT06968936Recruiting
Long-term outcomes of pre-surgery iron therapy
This study looks at long-term results of giving iron before major heart surgery to people with low iron levels. It aims to see if this treatment helps recovery and outcomes.
Hangzhou, ZhejiangAges 18–85 - NCT03516968RecruitingPhase 3
Monthly vs daily vitamin D for obese children
This study compares taking vitamin D as a monthly dose versus a daily dose in children with low vitamin D levels. It aims to correct the vitamin D deficiency and see which schedule works best and is safe.
BronAges 5–18 - 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 - NCT03824106Recruiting
Frailty rehab program for older adults at YMCA
This trial studies a rehabilitation (rehab) program to help older adults who are at risk of losing mobility and independence. You may be offered group-based rehab at the YMCA if you meet age, mobility, safety, and participation requirements.
Hamilton, OntarioAges 65 years+ - NCT06776640Recruiting
Vitamin D3 before dental implant surgery for better bone bonding
This trial tests whether taking vitamin D3 pills before and after dental implant surgery helps the implant bond better with the bone. It is for people who have low vitamin D levels and are already scheduled for an implant.
Nantes, NantesAges 18 years+ - NCT05714917Recruiting
Studying recovery after nerve damage from NOS use
This study looks at how neurological symptoms (like numbness, weakness, unsteadiness, or walking problems) recover after damage caused by NOS use. It may help researchers understand what recovery looks like and what support or treatments could work best.
BirminghamAges 16–40 - NCT06758778Enrolling by invitation
How the body processes fish oil and other supplements
This study compares how healthy adults absorb fish oil (CreNeuroS CNS Fish Oil Plus) with two approved medicines (Vascepa and Deplin). It helps researchers understand if the new product works similarly in the body.
Hyderabad, TelanganaAges 18–45 - NCT06081387Recruiting
Exercise and vitamin D for type 2 diabetes
This study tests whether adding aerobic and resistance exercise to your routine helps manage type 2 diabetes better when you already take metformin, an SGLT2 inhibitor, and possibly vitamin D. You would be assigned either to an exercise program or to continue your usual care.
BarcelonaAges 40 years+ - NCT04959864Recruiting
Food supplement study for sperm DNA damage in men
This trial tests whether a daily food supplement (with myo-inositol, N-acetyl-cysteine, zinc, and vitamins) can reduce sperm DNA damage. It enrolls men with higher-than-normal sperm DNA fragmentation, and it checks semen health during the study.
ParisAges 20–45 - NCT06570889RecruitingPhase 3
Vitamin D in pregnancy to prevent early childhood asthma
This trial tests if taking extra vitamin D during pregnancy can prevent asthma in young children. It is for pregnant women in Denmark who already have certain healthy fat levels in their blood.
Gentofte MunicipalityAges 18–45 - NCT06410443Recruiting
Steroid treatment for radiation-induced bowel injury
This trial tests if local steroids can help heal bowel damage caused by radiation therapy for cancer. It may reduce pain, bleeding, and urgency, and improve quality of life.
Shenyang, LiaoningAges 18 years+ - NCT06373848Enrolling by invitation
Vitamin E and Coenzyme Q10 for early gum disease
This study tests whether adding vitamin E and coenzyme Q10 to standard gum treatment can help heal early-stage chronic gum disease. It is for otherwise healthy adults aged 28-35 with mild gum pockets on their lower molars.
TehranAges 28–40 - NCT06347315Recruiting
Studying a nutritional drink for mild memory loss in older adults
This study tests whether a special drink containing medium-chain triglycerides (MCTs, a type of fat) and B vitamins can help support memory and thinking in older adults with mild cognitive impairment (MCI). You would take the drink daily for 18 months and have regular check-ins including memory tests.
BronAges 60 years+ - NCT06327581Recruiting
Microneedling with creams for patchy hair loss
This trial tests if microneedling with either lactic acid, vitamin D3, or a steroid cream helps regrow hair in people with patchy alopecia areata (small bald spots).
ZagazigAges 16 years+ - NCT06321991RecruitingPhase 2
Shrinking palm lumps in Dupuytren disease
This study tests a treatment for people with Dupuytren disease who have a lump (nodule) in their palm but no finger bending yet. It aims to see if the lump can shrink and prevent the disease from getting worse.
Leuven, Vlaams-BrabantAges 18 years+ - NCT06285357Recruiting
Testing EGCG, folic acid, and vitamin B12 for HPV
This trial tests whether taking a combination of EGCG (a compound from green tea), folic acid, and vitamin B12 can help prevent an HPV infection from lasting or getting worse. You may be able to join if you have a high-risk HPV infection but not a more serious cervical cell change called HSIL.
Modena, ModenaAges 25–65 - NCT05787808Recruiting
Preventive treatment for people with early bone loss
This trial studies a preventive treatment for people over 55 who have early bone thinning (called osteopenia). If you qualify, it may help reduce the risk of getting osteoporosis and related fractures.
Skjetten, AkershusAges 55–85 - NCT06267859Enrolling by invitationEarly Phase 1
Better treatment for common childhood illnesses
This study aims to improve treatment for children with common illnesses like bronchitis and for those who get sick often, to help them recover faster and stay healthier.
Tashkent, Yunus-obad DistrictAges 3 days–15 years - NCT06234501Recruiting
Does vitamin B6 help sensory issues in autism?
This trial tests whether taking a daily 100 mg vitamin B6 supplement can help with sensory reactivity in autistic adults. It involves taking either the vitamin or a placebo (fake pill) for a set period and reporting how your senses (like touch, sound, or light) feel.
ReadingAges 18–60 - NCT04268849RecruitingPhase 3
IV vs oral iron after weight-loss surgery
This Phase 3 study compares taking iron through an IV versus by mouth to treat iron-deficiency anemia after Roux-en-Y gastric bypass or sleeve gastrectomy. The goal is to see which method works better and is safer for improving iron levels and blood counts.
Baltimore, MarylandAges 18 years+ - NCT06012760Recruiting
Can iron and vitamin C reduce transfusions during heart surgery?
This trial is testing whether giving iron plus vitamin C before heart surgery can reduce the need for blood transfusions. It is for people with low iron and anemia who are scheduled for bypass or valve surgery.
Hangzhou, ZhejiangAges 18 years+
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.