Treatment
Vitamin D clinical trials
We’re tracking 119 recruiting studies that include Vitamin D, each written for real people, not researchers, below.
Recruiting studies
- NCT06861062Recruiting
Vitamin D and yeast beta-glucan for type 2 diabetes
This trial tests if taking vitamin D3 and yeast beta-glucan supplements can help control blood sugar and lower heart disease risk in people with type 2 diabetes. It may be an option for those who want to see if supplements can improve their diabetes management.
Nanning, GuangxiAges 40–79 - NCT07842120RecruitingPhase 2
Can certain medications speed up tooth movement with braces?
This study tests three different treatments (MOP, prostaglandin E1, and calcitriol) to see if they can make teeth move faster during orthodontic treatment. If you're getting braces for moderate crowding, this could reduce your treatment time.
Baghdad, Baghdad GovernorateAges 18–25 - 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 - 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+ - 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 - NCT04442412RecruitingPhase 3
Prednisone and vitamin D before chemo for certain lymphomas
This Phase 3 study tests whether a short “pre-treatment” with prednisone, with or without vitamin D, can improve outcomes when followed by standard lymphoma chemo. It aims to see if adding vitamin D early can help older adults tolerate or benefit from treatment for specific lymphoma types.
Brescia, BSAges 65 years+ - NCT07813975Recruiting
Vitamin D for healing bed sores in intensive care
This trial tests whether giving vitamin D supplements through a feeding tube can help heal bed sores (pressure injuries) in intensive care patients. It is for patients who have low vitamin D and early-stage bed sores, and who are otherwise stable enough to participate.
CairoAges 18–60 - NCT07053657Recruiting
Vitamin D for heart health in overweight teens
This study looks at whether giving vitamin D can improve heart and metabolic health in overweight or obese teens who have low vitamin D levels. It may help lower risks like high blood sugar or cholesterol.
Anqing, AnhuiAges 10–16 - NCT05667090Recruiting
High-dose vitamin D3 to ease chronic pain in dialysis patients
This study tests whether taking a very high dose of vitamin D3 can reduce moderate to severe chronic pain in people on hemodialysis. It may help by improving vitamin D-related pathways that could affect pain, but you must also meet specific health and testing requirements.
TaipeiAges 20 years+ - NCT05174611RecruitingPhase 2
Vitamin D to strengthen the thigh after ACL surgery
This Phase 2 study tests whether taking vitamin D can improve thigh (quadriceps) muscle strength after ACL reconstruction. It targets people with low vitamin D levels that persist after surgery and weaker thigh strength on the injured side.
Hong KongAges 18–40 - NCT06201013Recruiting
Vitamin D for children with wet overactive bladder
This trial tests whether giving vitamin D to children with 'wet' overactive bladder (OAB) – where they leak urine with sudden urges – can help improve symptoms. It's for children aged 5 and older who have low vitamin D levels and no other serious health conditions.
Chongqing, Chongqing MunicipalityAges 5–18 - NCT02172651RecruitingEarly Phase 1
Vitamin D during early colon cancer or liver surgery
This trial studies whether taking higher-dose vitamin D3 around the time of colon cancer (or colon cancer with resectable liver metastases) surgery improves outcomes. It focuses on safety and possible effects on cancer-related health after surgery.
Boston, MassachusettsAges 18 years+ - NCT05670262Recruiting
Study vitamin D and gut bacteria in childhood allergies
This study looks at how gut bacteria (microbiome) and vitamin D levels in newborns may influence whether children develop allergies. It starts with newborn babies and aims to better understand what early factors could predict allergic diseases.
TaichungAges birth–1 year - NCT07763977Enrolling by invitation
Vitamin D and iron study for obsessive-compulsive disorder
This study tests whether vitamin D and iron levels affect brain function linked to self-control in people with OCD. It may help find new ways to improve treatment.
Guangzhou, GuangdongAges 14–45 - 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 - NCT07651709Recruiting
Bone Health During Pregnancy in Women With Epilepsy
This study looks at how epilepsy and epilepsy medications affect bone health during pregnancy and after delivery. Researchers want to understand how to keep bones strong while you're pregnant and taking seizure medications, which can sometimes weaken bones.
ZhejiangAges 18 years+ - NCT07534852Recruiting
Nutrition and exercise support for colon cancer surgery patients
This study tests whether nutrition support and exercise help patients with early-stage colon cancer recover better after surgery. Researchers will provide dietary guidance and a supervised exercise program tailored to your needs.
Málaga, MalagaAges 18–75 - NCT07491601Recruiting
Preventing low parathyroid after thyroid surgery
This study aims to find ways to detect and prevent low parathyroid function after thyroid surgery. If you are having your whole thyroid removed, joining could help researchers learn how to improve recovery.
Würzburg, BavariaAges 18 years+ - NCT07479290RecruitingPhase 1
Vitamin D gel to speed up tooth movement after extraction
This trial tests whether applying vitamin D near the extraction site can speed up how quickly your canine teeth move into the gap after premolars are removed. It might help shorten your orthodontic treatment.
Islamabad, FederalAges 13 years+ - NCT04775381RecruitingPhase 3
Vitamin D before thyroid surgery to prevent low calcium
This study tests whether taking vitamin D (cholecalciferol) before a total thyroid removal can reduce the risk of developing low blood calcium afterward. If you’re having your thyroid removed, the results may help prevent symptoms like tingling, cramps, or spasms caused by low calcium.
AuxerreAges 18 years+ - NCT07465497Enrolling by invitation
Preventing Chemo Brain with Prebiotics and Synbiotics
This trial tests whether taking a special blend of prebiotics and synbiotics (friendly bacteria and food for them) can help prevent or reduce memory and thinking problems that sometimes happen during chemotherapy for breast cancer.
Zapopan, JaliscoAges 18 years+ - 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+ - NCT07369063RecruitingPhase 2
Vitamin D for pediatric Graves' disease
This study tests whether adding vitamin D therapy to the usual Graves' disease treatment (methimazole) can improve thyroid function and lower antibody levels in children. If your child is between 9 and 17 and recently diagnosed, they may be able to participate.
New Hyde Park, New YorkAges 9–17 - NCT07366086RecruitingPhase 3
Long-term safety of romosozumab for osteogenesis imperfecta in children
This study follows children who previously received romosozumab in an earlier trial to check their long-term safety. It helps understand if the treatment's benefits last safely over time.
Indianapolis, IndianaAges 5–19
Common questions
- Are there clinical trials studying Vitamin D?
- Yes. Clin2 currently lists 119 recruiting studies that include Vitamin D, 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 D 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 D 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 D 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.