Treatment
Vitamin D3 clinical trials
We’re tracking 39 recruiting studies that include Vitamin D3, each written for real people, not researchers, below.
Recruiting studies
- NCT04677816RecruitingPhase 2
Vitamin D supplements for triple-negative breast cancer before surgery
This trial tests whether taking high-dose vitamin D during pre-surgery (neoadjuvant) chemotherapy can increase the chance of having no remaining cancer found at surgery. It focuses on people with vitamin D deficiency and triple-negative breast cancer.
Winston-Salem, North CarolinaAges 18 years+ - 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+ - NCT07085598Recruiting
Vitamin D3 for heart nerve health in men with epilepsy
This study tests whether taking vitamin D3 supplements can improve how well the nerves controlling your heart work in men with epilepsy who have low vitamin D levels. If you have low vitamin D from taking certain epilepsy medicines, this trial may help understand if vitamin D can support your heart health.
Dhaka, ShahbagAges 20–40 - 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+ - NCT07084597Recruiting
Vitamin D3 for Heart Health in Parkinson's Men
This study tests whether taking vitamin D3 supplements can improve the nerve function that controls your heartbeat in men with Parkinson's disease who have low vitamin D levels. If you have mild to moderate Parkinson's and are on levodopa, this trial may help understand if vitamin D can support your heart health.
Dhaka, ShahbagAges 51–70 - 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+ - 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+ - NCT04871412RecruitingPhase 3
Surgery care program for lung or upper GI cancer patients
This trial tests an “integrative” support program around the time of cancer surgery to see if it improves care and outcomes for people having surgery for lung, stomach, or esophagus cancer. It may help by adding extra structured support during the peri-operative (around-surgery) period.
Ottawa, OntarioAges 18 years+ - NCT05589064Recruiting
Diet and nutrition program for lingering concussion symptoms
This study tests whether a dietary and nutrition intervention can improve symptoms that linger after a concussion. It may help people whose post-concussion symptoms have lasted a short to medium time (at least 2 weeks).
Moncton, New BrunswickAges 16 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+ - NCT06950463Recruiting
Circuit training for bone health after menopause
This trial tests whether a specific exercise program (circuit training) can improve bone density in women after menopause who have low bone mass. It may help strengthen bones and reduce fracture risk.
CairoAges 50–60 - NCT05043116RecruitingPhase 2
Vitamin D for preventing asthma-like flare-ups in young children
This study tests whether a high-dose vitamin D supplement can help preschool children have fewer acute asthma-like symptoms (coughing, wheezing, or trouble breathing) that require hospital care. It may help by supporting the immune and airway system, but you can only join if the child meets several safety and treatment criteria.
Gentofte Municipality, GentofteAges 1 year–5.9 years - 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
Common questions
- Are there clinical trials studying Vitamin D3?
- Yes. Clin2 currently lists 39 recruiting studies that include Vitamin D3, 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 D3 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 D3 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 D3 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.