Clinical trials
Vitamin A Deficiency clinical trials
Below are recruiting vitamin a deficiency clinical trials, each written for real people, not researchers. We’re tracking 40 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT07864662Recruiting
Food and vitamin D for healthy school children
This study tests if adding trout fish, cow milk with egg, and vitamin D to children's diets can improve their vitamin D levels, nutrition, and brain function. It is for healthy children aged 6-12 who go to certain schools in Pakistan.
Karachi, SindhAges 6–12 - NCT05785585Recruiting
B12 supplements test for people on a vegetarian diet
This study compares two forms of vitamin B12 to see how well they improve or maintain B12 levels in adults who eat vegetarian. It may help people understand which type of B12 works best for supporting normal B12 status.
Reus, TarragonaAges 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 - 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+ - 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 - NCT04179370Recruiting
Vitamin D and health in British African-Caribbean women
This study looks at vitamin D levels and how they relate to overall health in British African-Caribbean women. It may help researchers understand whether vitamin D support or lifestyle changes could benefit this group.
GuildfordAges 18 years+ - NCT07866391Enrolling by invitation
Vitamin D levels in Zhejiang province
This study looks at vitamin D levels in people in Zhejiang province, China. It aims to understand what factors affect vitamin D levels.
Hangzhou, ZhejiangAges Any age - NCT06830187Recruiting
Bone density, vitamin D, and hearing loss in otosclerosis
This study looks at how bone density and vitamin D levels relate to hearing loss in people with otosclerosis, a condition where extra bone growth in the ear causes hearing problems. It may help doctors understand why some people lose more hearing than others.
AnkaraAges 18 years+ - NCT06759493Recruiting
Testing a simpler method to measure vitamin A in children
This study tests a simpler way to measure vitamin A levels in schoolchildren in Burkina Faso. It may help improve nutrition assessments for kids.
Bobo-Dioulasso, Bobo-Dioulasso, Houet, Région Des hauts-BassinsAges 7–12 - NCT04987073Recruiting
Vitamin D type added for CYP24A1 vitamin D deficiency
This study tests a vitamin D-like medicine for people with a specific genetic cause of low active vitamin D (CYP24A1 deficiency). If you have the right gene change, it may help your body use vitamin D more normally.
Caen, NormandyAges 18 years+ - NCT05005897RecruitingPhase 2/Phase 3
Micronutrient supplements for early infant growth and development
This study tests whether early infant nutrition using specific micronutrients (small amounts of key vitamins and nutrients) can support healthy growth and development. It includes babies whose moms plan to breastfeed for long enough, and it excludes infants with serious health problems.
LillehammerAges 1 month–2 months - 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+ - 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 - NCT07227740Recruiting
Testosterone treatment for blood vessel health after spinal cord injury
This study looks at whether low testosterone affects blood vessel health in men with recent spinal cord injury. It tests if testosterone replacement can help improve blood vessel function.
Englewood, ColoradoAges 18–89 - 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+ - NCT07605676RecruitingPhase 4
Acupuncture stimulation versus strength training for anemia from heavy periods
This study tests whether acupuncture-based electrical stimulation or resistance (strength) training can help women with moderate iron-deficiency anemia caused by heavy menstrual bleeding. Both treatments aim to improve energy levels and blood counts alongside standard medical care.
CairoAges 20–30
Hear when a new Vitamin A Deficiency trial opens
We’ll email you when one opens — at most once a week, no account needed, unsubscribe anytime.
Common questions
- Are there clinical trials for vitamin a deficiency?
- Yes. Clin2 currently lists 40 recruiting vitamin a deficiency studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a vitamin a deficiency trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a vitamin a deficiency trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.