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
- NCT07048860Recruiting
Pilot study: intense exercise and coaching for older adults with weight and memory concerns
This pilot study tests a program to help older adults who are overweight, sedentary, and have mild memory changes. The goal is to see if intense, supervised physical activity and lifestyle coaching can improve mobility and thinking.
ToulouseAges 65–85 - NCT07096336Recruiting
Vitamin D3 and brain waves in Parkinson's study
This study tests whether taking vitamin D3 can improve brain wave patterns in men with Parkinson's disease who have low vitamin D levels. It may help understand if vitamin D supports brain health.
Dhaka, ShahbagAges 51–70 - NCT07121036RecruitingPhase 1
High-dose vitamin C infusion for advanced solid tumors
This trial tests a special high-dose vitamin C infusion, given based on how your body processes it, for people with advanced solid tumors. It aims to see if this vitamin C therapy can be safely combined with your current or new chemotherapy to help control the cancer.
Wuhan, HubeiAges 18–75 - NCT07288801RecruitingPhase 4
Vitamin D to prevent preeclampsia again in pregnancy
This trial tests whether taking vitamin D can help pregnant women who had preeclampsia before avoid getting it again. It may protect both you and your baby.
Multan, Punjab ProvinceAges 20–45 - NCT07317830Recruiting
Comparing vitamin D3 forms for low vitamin D
This study compares different forms of vitamin D3 to find which works best for adults with low vitamin D levels. If you have a vitamin D deficiency and are generally healthy, this trial may help determine the most effective supplement for you.
BelgradeAges 18–80 - NCT07335991Recruiting
Vitamin A for children with scoliosis and low vitamin A
This trial tests whether vitamin A supplements can help children with idiopathic scoliosis (a spinal curve with no known cause) who also have low vitamin A levels. It aims to see if correcting the deficiency can improve the spine curve or slow its progression.
Wenzhou, ZhejiangAges 6–15 - NCT07677826Recruiting
Q10 and Vitamin C for Gum Lightening
This trial tests whether applying coenzyme Q10 and vitamin C, alone or together, after a gum lightening procedure can improve results. It may help if you have dark gums and want a safer, more effective treatment.
NāşirAges 18–45 - NCT07414693RecruitingPhase 4
Vitamin C for kids with severe pneumonia
This trial tests if giving vitamin C to children hospitalized with severe pneumonia can help them get better faster and leave the hospital sooner. It may be an option for children who have had pneumonia symptoms for 48 hours or less.
Multan Khurd, Punjab ProvinceAges 2 months–4.9 years - NCT07636733Recruiting
Vitamin D for Gum and Bone Health in Periodontal Disease
This study tests whether vitamin D supplements can reduce inflammation and improve healing in people with gum disease, ranging from mild gingivitis to advanced periodontitis. Researchers will compare how vitamin D affects different stages of gum disease.
RizeAges 18–70 - NCT07341789Enrolling by invitation
Vitamin B12 and orange extract for better performance
This study tests whether vitamin B12, natural orange extract, or both together can improve your physical and mental performance. It is for healthy men who exercise regularly and eat citrus fruits.
La Ñora, MurciaAges 18–45 - NCT05795504Enrolling by invitation
Exercise program to improve calcium and vitamin D levels
This trial compares two exercise routines—resistance training versus high-intensity interval training (HIIT)—to see which better improves calcium intake and vitamin D levels in women. You may be able to join if you are 40–45, have low vitamin D, and are not using hormone therapy.
GizaAges 40–45 - NCT07448844RecruitingPhase 4
Comparing vitamin D3 and acyclovir shots for skin warts
This trial tests two injected treatments (vitamin D3 or acyclovir) for common skin warts. The goal is to see which one works better for warts that are new or have not gone away with other treatments.
Rawalpindi, Punjab ProvinceAges 12 years+ - NCT06842368Recruiting
Immediate implants with vitamin D or hyaluronic acid bone graft
This study compares two types of bone graft materials mixed with either vitamin D or hyaluronic acid for dental implants placed immediately after a tooth is removed. It aims to see which helps the implant heal better.
CairoAges 18–60 - NCT06581900Recruiting
Vitamin B12 in kids with sickle cell disease
This study looks at how children with sickle cell disease process vitamin B12 when exposed to a gas painkiller called MEOPA. It may help doctors understand how to manage treatment better.
ReimsAges 2–18 - NCT06429787Recruiting
Safety study of BALFAXAR vs. Kcentra for urgent blood thinner reversal
This study compares the safety of two medications, BALFAXAR and Kcentra, used to quickly reverse the effects of blood thinners (like warfarin) in people who need urgent surgery or a procedure. It helps doctors understand which option may be safer for patients in this situation.
Boston, MassachusettsAges 18 years+ - 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+ - NCT04721899Recruiting
Vitamin D study to improve uterine lining for pregnancy
This trial tests whether taking vitamin D can improve the uterine lining’s readiness for pregnancy in women who struggle to conceive. It compares different groups of infertile patients to see who may benefit and to monitor for safety.
Hong KongAges 18–40 - NCT07381998Enrolling by invitation
Effects of total thyroid removal on parathyroid function and quality of life
This study looks at how completely removing the thyroid gland affects the nearby parathyroid glands (which control calcium) and your overall quality of life. If you're having a total thyroid removal and meet a few health conditions, you may be able to join.
Aarhus, Central JutlandAges 18 years+ - NCT07708233RecruitingPhase 4
Benfotiamine vs vitamin B complex for diabetic nerve pain
This study compares two types of vitamin B supplements to see which one better relieves nerve pain and numbness in people with diabetes. It may help if you have diabetic neuropathy and are looking for a safe, non-drug option.
Pathumthani, BangkokAges 18 years+ - NCT06919718Recruiting
Vitamin D supplements for new mothers in Idaho
This trial tests whether taking vitamin D supplements can improve mental health and change the nutrients in breast milk for mothers living in Idaho.
Coeur d'Alene, IdahoAges 18–64 - 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+ - NCT06045351RecruitingPhase 1
Vitamin D shots for women with PCOS and low vitamin D
This trial tests whether vitamin D injections can help females with polycystic ovary syndrome (PCOS) who also have low vitamin D levels. Participants will receive the injection and be monitored for changes in their condition.
Karachi, SindhAges 18–45 - NCT06569264Recruiting
Comparing socket preservation methods after tooth extraction
This trial tests two different treatments to preserve the bone and gum after a tooth is removed. It compares using a dentin graft with I-PRF (a special blood concentrate) to the same treatment with added vitamin C. The goal is to see which helps the healing better before a dental implant.
CairoAges 18–65 - NCT06983730RecruitingEarly Phase 1
Vitamin B3 and Kidney Response to Exercise in Heat
This study tests how your kidneys respond to exercise in the heat, and whether taking vitamin B3 (niacin) changes that response. It might help protect the kidneys of people who work or exercise in hot conditions.
Boston, MassachusettsAges 18–45
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.