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Home › Medications › Vitamin D

Vitamin D

16 published articles · Updated continuously

Clinical Trial Landscape

Clinical Trials of Vitamin D

26 trials tracked of Vitamin D: 14 in phase 3 or 4 and 4 with published results. The most-cited published study has 579 citations.

26Trials tracked
14Phase 3 & 4
0Recruiting
4With published results
Phase distribution
Phase 4 8 Phase 3 6 Phase 2 6 Phase 1 2 Other / NA 4
  1. Phase 4 VERtebral Fracture Treatment Comparisons in Osteoporotic Women Completed · 579 cited
  2. Phase 3 Vitamin D Supplementation in Cutaneous Malignant Melanoma Outcome Completed · 39 cited
  3. Phase 4 Teriparatide for Joint Erosions in Rheumatoid Arthritis: The TERA Trial Completed · 37 cited
  4. Phase 4 Effect of Vitamin D as Adjuvant Therapy in Preterm Infants With Neonatal Sepsis Completed
  5. Phase 4 Can Vitamin D Reduce Heart Muscle Damage After Bypass Surgery? Completed
  6. Phase 4 Evaluating Vitamin D3 Supplement on Post-Op Outcomes Completed
Show 20 more trials
  1. Phase 4 Effects of Teriparatide or Denosumab on Bone in Postmenopausal Women With Osteoporosis Completed
  2. Phase 4 20070360 Incident Dialysis Completed
  3. Phase 4 Does Treatment of Hypovitaminosis D Increase Calcium Absorption? Completed
  4. Phase 3 Effect of Vitamin D Supplementation on Exercise Adaptations in Patients on Statin Therapy Completed
  5. Phase 3 Prevalence of Vitamin D Deficiency in Type 1 Diabetes Mellitus and Effect of Supplementation on Insulin Requirements Completed
  6. Phase 3 The Effects of Vitamin D Repletion in Vitamin D Deficient Patients With Stage 3 and 4 Chronic Kidney Disease Completed
  7. Phase 3 Effects of Electrical Stimulation and Vitamin D Supplementation on Bone Health Following Spinal Cord Injury. Completed
  8. Phase 3 Effect of Zoledronic Acid on Chemotherapy Induced Bone Loss Completed
  9. Phase 2 Effect of Vitamin D Repletion on Insulin Resistance and Systemic Inflammation Completed
  10. Phase 2 Study of Vitamin D and Effect on Heart Disease and Insulin Resistance Completed
  11. Phase 2 High Dose Vitamin D for Sickle Cell Disease Completed
  12. Phase 2 Injections of Glutamic Acid Decarboxylase (GAD) for LADA Type of Diabetes Completed
  13. Phase 2 Development of Vitamin D as a Therapy for Breast Cancer - Phase 2 Completed
  14. Phase 2 EDCR Study - Etanercept Diamyd Combination Regimen -Open Trial to Evaluate Safety in Children With Type 1 Diabetes Completed
  15. Phase 1 GAD-Alum (Diamyd) Administered Into Lymph Nodes in Combination With Vitamin D in Type 1 Diabetes (DIAGNODE-1) Completed
  16. Phase 1 Vitamin D for Chemoprevention Completed
  17. N/A Effect of Vitamin D3 on Vascular Function Completed
  18. N/A Vitamin D in Minorities With Prediabetes Completed
  19. N/A Efficacy and Safety of Blue Light (453 nm) Treatment for Mild Psoriasis Vulgaris Over Three Months Compared to Vitamin D. Completed
  20. N/A Effect of Vitamin D on the Honeymoon Period in Children and Adolescents With Type 1 Diabetes Completed

Showing the 26 most-cited and recently-updated of 26 trials. Browse the full registry →

Trial data sourced from ClinicalTrials.gov. Counts describe the research landscape and are not a treatment recommendation. Informational only — not medical advice.

HCP Mode — summaries include clinical detail, trial data, and statistical outcomes.
Patient Mode — summaries use plain language, avoiding clinical jargon.
High-Dose Vitamin D and Low-Dose Vitamin A May Reduce Bronchopulmonary Dysplasia in Preterm Infants
Pediatrics Meta-analysis
High-Dose Vitamin D and Low-Dose Vitamin A May Reduce Bronchopulmonary Dysplasia in Preterm Infants High-Dose Vitamin D May Reduce BPD in Preterm Infants
A network meta-analysis of 4357 preterm infants found that high-dose vitamin D (≥800 IU/d) most notably reduced bronchopulmonary dysplasia i…
A large analysis of preterm infants found that high-dose vitamin D (≥800 IU/day) may lower the risk of bronchopulmonary dysplasia, while low…
NEJM Jun 4, 2026
Vitamin D improves strength and reduces injuries in dancers, while iron lowers anemia prevalence
Nutrition & Obesity Medicine Meta-analysis
Vitamin D improves strength and reduces injuries in dancers, while iron lowers anemia prevalence Dancers take many supplements, but benefits are often unproven and risks remain unclear
This systematic review of dietary supplement and medication use in 654 female and 86 male professional and pre-professional dancers found vi…
Dancers use many supplements and painkillers, yet benefits are limited and potential health risks need more study before we can trust them.
Frontiers Jun 4, 2026
Systematic review shows intralesional vitamin D reduces steroid risks for keloid patients
Rheumatology Meta-analysis
Systematic review shows intralesional vitamin D reduces steroid risks for keloid patients Triamcinolone works better for keloids, but vitamin D spares skin damage
A meta-analysis of four trials found intralesional triamcinolone acetonide superior for scar improvement versus vitamin D. However, vitamin …
Triamcinolone acetonide improves keloid scars more than vitamin D, yet vitamin D lowers risks of skin thinning and color changes.
Frontiers Jun 3, 2026
Case report reviews possible autoimmune hypoparathyroidism after SARS-CoV-2 infection in a young adult
Diabetes & Endocrinology Sys. Review
Case report reviews possible autoimmune hypoparathyroidism after SARS-CoV-2 infection in a young adult Young woman develops low calcium and thyroid issues after severe coronavirus infection
This case report with literature review examines a young adult Chinese woman with hypoparathyroidism and hypocalcemia following SARS-CoV-2 i…
A young Chinese woman developed low calcium and thyroid problems after getting sick with coronavirus. Doctors think her body might have stop…
Frontiers May 25, 2026
Systematic review finds vitamin D supplementation offers no lung function benefit for children with asthma
Allergy & Immunology Meta-analysis
Systematic review finds vitamin D supplementation offers no lung function benefit for children with asthma Vitamin D supplements don't improve lung function in kids with asthma
A meta-analysis of 1239 children with asthma examined vitamin D supplementation effects. Results showed no improvement in lung function or i…
A new analysis of 1239 children finds vitamin D supplements don't help lung function or asthma control. Here's what parents should know.
Frontiers May 25, 2026
Meta-analysis finds vitamin D supplementation does not significantly affect ovarian reserve markers in women
Diabetes & Endocrinology Meta-analysis
Meta-analysis finds vitamin D supplementation does not significantly affect ovarian reserve markers in women Vitamin D Supplements Won't Boost Your Fertility After All
This meta-analysis of 992 women of reproductive age found no significant overall effect of vitamin D supplementation on serum AMH levels. Su…
If you are taking vitamin D hoping it will improve your egg count, a new analysis of 11 trials suggests the supplements likely do not change…
Frontiers May 11, 2026
Network meta-analysis of pediatric atopic dermatitis treatments shows dupilumab and pimecrolimus efficacy
Neurology Meta-analysis
Network meta-analysis of pediatric atopic dermatitis treatments shows dupilumab and pimecrolimus efficacy Dupilumab and Pimecrolimus Lead New Rankings for Children's Eczema Relief
This network meta-analysis evaluated dupilumab, pimecrolimus, melatonin, probiotics, tralokinumab, nemolizumab, and vitamin D for pediatric …
A new analysis ranks the top treatments for children's eczema, with dupilumab and pimecrolimus leading for symptom relief.
Frontiers May 2, 2026
Vitamin D supplementation may reduce disease activity in SLE: a systematic review and meta-analysis
Rheumatology Meta-analysis
Vitamin D supplementation may reduce disease activity in SLE: a systematic review and meta-analysis Vitamin D supplements may calm lupus activity, study finds
This systematic review and meta-analysis of 847 patients with systemic lupus erythematosus found that vitamin D supplementation significantl…
A new analysis of 847 lupus patients suggests vitamin D supplements may reduce disease activity and improve immune markers.
May 1, 2026
Baseline vitamin D levels linked to semaglutide glycemic and weight outcomes in type 2 diabetes
Cardiology Cohort
Baseline vitamin D levels linked to semaglutide glycemic and weight outcomes in type 2 diabetes Higher Vitamin D levels help Semaglutide work better for diabetes
This observational cohort study of 5,384 adults with type 2 diabetes found that higher baseline vitamin D levels were associated with greate…
New data shows higher Vitamin D levels help Semaglutide lower blood sugar and weight more effectively in diabetes patients.
Frontiers Apr 28, 2026
Narrative review proposes redox-guided framework for vitamin D, myo-inositol, and melatonin in PCOS
OB/GYN & Women's Health Sys. Review
Narrative review proposes redox-guided framework for vitamin D, myo-inositol, and melatonin in PCOS Researchers propose new PCOS framework using vitamin D and melatonin
This narrative review synthesizes existing data on combined vitamin D, myo-inositol, and melatonin supplementation for polycystic ovary synd…
A new framework suggests combining vitamin D, myo-inositol, and melatonin for PCOS ovulation and insulin markers.
Frontiers Apr 28, 2026
Cochrane review finds vitamin D may slightly reduce ARI healthcare visits in children
Gastroenterology Sys. Review
Cochrane review finds vitamin D may slightly reduce ARI healthcare visits in children Vitamin D may slightly cut cold visits for kids, but safety is key
This Cochrane systematic review of 31,521 participants found that vitamin D supplementation may slightly reduce the proportion of children w…
A large review of 31,521 people found vitamin D might slightly reduce cold visits for children, though it does not lower the average number …
Cochrane Apr 27, 2026
Baseline vitamin D deficiency occurred in 73.08% of TAO patients receiving IVGC therapy with calcium supplementation
Allergy & Immunology Cohort
Baseline vitamin D deficiency occurred in 73.08% of TAO patients receiving IVGC therapy with calcium supplementation Simple Blood Test Could Predict Thyroid Eye Treatment Success
This retrospective cohort study evaluated 52 thyroid-associated ophthalmopathy patients treated with intravenous glucocorticoids and standar…
Checking vitamin D levels could help doctors choose the best treatment for thyroid eye disease.
Frontiers Apr 21, 2026

All Vitamin D Articles