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
- 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+ - 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 - 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 - NCT05937789Recruiting
Vitamin D3 during early ICU care to help critically ill adults
This trial tests whether starting vitamin D3 soon after ICU admission helps critically ill adults with low vitamin D levels. It may help correct low vitamin D and possibly improve recovery, depending on your health situation.
TaipeiAges 18 years+ - 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 - NCT07648706Recruiting
Vitamin D supplements to prevent pregnancy complications
This study tests whether vitamin D supplements can help prevent preeclampsia (a serious pregnancy condition with high blood pressure) in women with low vitamin D levels. You would take vitamin D pills during pregnancy and be monitored to see if this reduces your risk.
Sanaa, Maeen DistrictAges 18–40 - NCT07012161RecruitingEarly Phase 1
Vitamin D for fibroid symptoms in women with low vitamin D
This trial tests whether taking vitamin D3 can help reduce symptoms like heavy bleeding or pressure from uterine fibroids. It is for women who have fibroids and are also low in vitamin D.
Dhaka, SahabagAges 18–50 - 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 - NCT06757244RecruitingPhase 2
Dovipa: Immunotherapy and vitamin D with chemo for advanced pancreatic cancer
This trial tests whether combining the immunotherapy dostarlimab with vitamin D3 and standard chemotherapy (mFOLFIRINOX) can help people with stage IV pancreatic cancer. It aims to see if this new approach is safe and effective.
MarseilleAges 18–75 - NCT07269223Recruiting
Oral vitamin D3 for inflammation in ulcerative colitis
This study tests whether taking vitamin D3 by mouth can reduce inflammation in people with moderate ulcerative colitis and low vitamin D levels. It may help if you have a confirmed diagnosis and are between 20–40 years old.
Lahore, Punjab ProvinceAges 20–40 - NCT07096414Recruiting
Vitamin D3 and brain waves in men with epilepsy and low vitamin D
This trial tests whether taking vitamin D3 supplements changes brain wave activity in men with epilepsy who also have low vitamin D levels. It aims to see if vitamin D could help improve brain function.
Dhaka, Shahbag, DhakaAges 20–40 - NCT07455656Recruiting
Vitamin D3 or gum massage for faster canine movement with braces
This study tests whether applying vitamin D3 or a special gum massage (corticision) next to the teeth can help move your eye teeth (canines) faster after your upper first premolars are removed for braces. It is for teenagers or young adults who already need that extraction as part of their orthodontic plan.
Cairo, Cairo GovernorateAges 13–20 - NCT07269457RecruitingPhase 2
Vitamin D3 for recovery after mild to moderate brain injury
This trial tests if taking vitamin D3 can help reduce swelling and speed up recovery after a mild to moderate traumatic brain injury. It is for people who have low vitamin D levels.
LagosAges 18–65 - 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+ - 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 - NCT06508099RecruitingPhase 2
Vitamin A and D supplements after stem cell transplant
This trial tests whether taking vitamin A and D after a stem cell transplant can help improve recovery. It is for people with certain blood cancers who have a matched donor and are in remission or have low disease activity.
Saint PetersburgAges 18 years+ - NCT06867952Recruiting
Vitamin K2 for bone loss with a specific gene change
This study tests whether taking vitamin K2 can help people with low bone density (osteopenia or osteoporosis) who have a specific change in the VDR gene. If you have this gene change, vitamin K2 may work better for you than standard supplements.
NovosibirskAges 40–75 - NCT04331639Recruiting
High-dose vitamin D for kids with IBD on biologic therapy
This trial studies whether giving a higher dose of vitamin D3 helps children and teens with inflammatory bowel disease (Crohn’s or ulcerative colitis) who have low vitamin D levels. Participants are already on biologic medicines and will be treated while monitoring blood (and safety) related to vitamin D.
Boston, MassachusettsAges 5–25 - NCT06551337RecruitingPhase 4
Vitamin D for bronchiectasis patients
This trial tests if taking vitamin D can help people with bronchiectasis have fewer flare-ups. It is only for patients who were in an earlier study that checked their vitamin D levels.
Hong KongAges 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 - 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+ - 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 - NCT03188796RecruitingPhase 3
High-dose vitamin D for ICU patients with low vitamin D
This trial tests whether giving a high dose of vitamin D3 can reduce death within 28 days for critically ill adults in the ICU who have very low vitamin D levels. It may help by correcting vitamin D deficiency, which the study team thinks could affect outcomes in serious illness.
EnzenbachAges 18–100
What Vitamin D3 is being studied for
Conditions with recruiting Vitamin D3 studies.
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.