Treatment
Vitamin A clinical trials
We’re tracking 276 recruiting studies that include Vitamin A, each written for real people, not researchers, below.
Recruiting studies
- NCT06749756Recruiting
Vitamins B6, B12 and C for sepsis
This trial tests whether a combination of vitamins B6, B12, and C can help improve blood flow in tiny blood vessels (microcirculation) for people with sepsis. It may help your body recover better from severe infection.
Chengdu, SichuanAges 18–85 - NCT07349290Enrolling by invitation
Vitamin D fortified foods for families
This trial tests if eating foods with extra vitamin D can improve vitamin D levels in families. It provides study foods and checks your vitamin D through blood samples.
ColeraineAges 4 years+ - NCT07151105Recruiting
Vitamin C for gut health in adults with obesity
This trial tests whether taking vitamin C supplements helps improve gut barrier function in adults with obesity. You'll follow a low-fruit-and-vegetable diet for two, two-week periods.
Columbus, OhioAges 18–50 - NCT05448365Recruiting
Vitamins and plant compounds for uterine fibroid symptoms
This trial studies whether a combination of vitamin D, epigallocatechin gallate (a plant compound), D-chiro-inositol, and vitamin B6 can improve symptoms from uterine fibroids. It may help by reducing symptoms such as heavy or irregular bleeding and pelvic pain in people who can undergo surgery.
Francavilla Fontana, ApuliaAges 30–40 - NCT07029698RecruitingPhase 4
Vitamin shot vs. pill for B12 deficiency
This study tests whether a vitamin B12 injection is as safe and effective as a B12 pill. You may be able to join if you have low B12 levels and are not currently taking B12 supplements.
KharkivAges 18 years+ - NCT06775548Enrolling by invitation
Exercise and vitamins for depression relief
This study tests if combining aerobic and resistance exercises with vitamins D and E can reduce stress and inflammation in people with mild to moderate depression. It may help improve mood and overall well-being.
Karachi, SindhAges 25–35 - NCT07670611RecruitingPhase 4
Vitamin D2 alone or with calcitriol for children with liver disease
This trial compares two types of vitamin D—one is plain vitamin D2, the other is vitamin D2 plus a more active form (calcitriol)—to see which works better for children with liver problems and low vitamin D levels.
BangkokAges Up to 18 years - NCT07099586Recruiting
Vitamin and folic acid levels in women of childbearing age
This study will check the levels of vitamin B12, folic acid, and vitamin D in women who could become pregnant. It aims to learn if certain health factors or supplement use affect these important nutrients.
MostarAges 18–49 - NCT07100795Recruiting
Vitamin B12, Folic Acid and D in Women of Childbearing Age
This study checks the levels of vitamin B12, folic acid, and vitamin D in women who could become pregnant. It aims to find out how common low levels are, so you may learn about your own vitamin levels.
MostarAges 18–49 - NCT04677816RecruitingPhase 2
Vitamin D for a better response to chemotherapy
This study tests whether taking high-dose vitamin D before and during chemotherapy helps eliminate more cancer before surgery in people with triple-negative breast cancer who are low in vitamin D.
Winston-Salem, North CarolinaAges 18 years+ - NCT06450925RecruitingPhase 2
Vitamin A supplement for stem cell transplant patients
This study tests whether giving vitamin A by mouth to adults before and after a stem cell transplant can help their recovery. The goal is to see if it reduces complications and improves overall outcomes.
Tampa, FloridaAges 18 years+ - NCT06654154Recruiting
Vitamin B12 as a marker for disease activity in tocilizumab patients
This study looks at whether vitamin B12 levels in the blood can help tell if your disease is active or if you have an infection while being treated with tocilizumab. The goal is to find a simple way to monitor your condition without extra invasive tests.
Clermont-FerrandAges 18 years+ - NCT07142759Enrolling by invitation
Vitamin D tomato soup trial for low vitamin D levels
This study tests whether a specially grown tomato soup (with extra vitamin D) can raise your vitamin D levels over 3 weeks. You'll eat one soup packet each day. It's for people who have low but not severely low vitamin D.
NorwichAges 18 years+ - NCT07199829Recruiting
Vitamin D and K for military healthcare workers
This study tests whether taking vitamin D3 and K2 supplements can improve health in military healthcare workers who have low vitamin D levels. If you qualify, you will stop any current vitamin D or K supplements and take the study supplement for 4.5 months.
Tacoma, WashingtonAges 18–69 - NCT07305519Recruiting
Can supplements prevent early birth for short cervix?
This study tests if taking a combination of magnesium, a natural supplement (palmitoylethanolamide), hyaluronic acid, and vitamins B6 and D can help prevent preterm birth in women with a shorter-than-ideal cervix.
Rome, RMAges 18 years+ - NCT07312123Recruiting
Vitamin mix for carpal tunnel recovery
This trial tests if taking a mix of vitamins can help adults heal better after surgery for carpal tunnel syndrome. It might help reduce pain and improve hand function.
Kubang Kerian, KelantanAges 18 years+ - NCT07366970Recruiting
Exercise and vitamin D for erectile dysfunction in diabetes
This trial tests whether adding exercise to your routine helps with erectile dysfunction if you have type 2 diabetes and low vitamin D levels. It aims to see if exercise can improve your symptoms.
Dokki, Giza GovernorateAges 35–45 - NCT07641075Recruiting
High-Dose Vitamin D Effects in Experienced Athletes
This study tests whether high-dose vitamin D supplements improve athletic performance, brain function, and body composition in experienced athletes. Researchers will measure hormones, muscle strength, thinking ability, and muscle mass over time.
Katowice, Mikołowska 72aAges 17–60 - NCT07565064Enrolling by invitation
Vitamin D Blood Test Stability Study
This study tests how accurately a vitamin D blood test works with fresh versus frozen samples. Your blood samples will help researchers understand the best way to store and measure vitamin D levels.
Salem, New HampshireAges 22 years+ - NCT06674122Enrolling by invitation
Vitamin D supplements for preterm babies
This trial tests whether giving preterm babies (born at 28-34 weeks) a higher dose of vitamin D by mouth helps them grow and stay healthy. It may be an option if your baby is already feeding well and doesn't have certain other health problems.
Jakarta, Central JakartaAges 6 months–8 months - NCT04355572Recruiting
Vitamin D replacement study for teens at risk of PCOS
This study looks at how taking vitamin D affects hormone levels and emotional well-being in teen girls who may develop PCOS. If you have low vitamin D and meet PCOS risk criteria, the study may test whether vitamin D helps you feel and function better.
New Haven, ConnecticutAges 13–21 - NCT06553729Recruiting
Vitamin D and prebiotic supplement for blood sugar during pregnancy
This trial tests whether taking a combination of vitamin D and a prebiotic can help manage blood sugar levels in pregnant women at high risk for gestational diabetes. It may offer a simple way to support a healthy pregnancy.
Zhanjiang, GuangdongAges 18–45 - NCT02705287Recruiting
Study vitamin D changes in women during pregnancy or adult life
This study measures how vitamin D levels change over about 20 days in women. It may help researchers understand vitamin D patterns in pregnancy and different body sizes, which can guide future health recommendations.
Rochester, New YorkAges 20–39 - NCT04036188RecruitingEarly Phase 1
Vitamin D and triamcinolone for plaque psoriasis
This early study tests whether taking vitamin D together with triamcinolone (a steroid used on skin) works better for plaque psoriasis than a standard approach. It aims to see if the combination helps clear psoriasis plaques and is safe.
Fairborn, OhioAges 18 years+
What Vitamin A is being studied for
Conditions with recruiting Vitamin A studies.
Common questions
- Are there clinical trials studying Vitamin A?
- Yes. Clin2 currently lists 276 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.