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About this data Sourced primarily from ClinicalTrials.gov — a listing isn't proof of safety or FDA approval.

Pipeline and clinical trial information here comes primarily from ClinicalTrials.gov. A listing on ClinicalTrials.gov means a study has been registered — not that a treatment is proven safe, effective, or FDA-approved. Investigational treatments may never be approved. Who can join a trial is decided only by that trial's own study team.

Not yet reported

Vitamin D3 /day

Company
AlFayhaa General Hospital
Mechanism
Mechanism not yet reported
Route
Route not yet reported
Recruiting trials
None currently listed

Efficacy results: Not yet reported

No recruiting studies currently listed

See all studies for this drug

Data source: ClinicalTrials.gov · trial data as of Oct 24, 2026

Trial details
  • Completed NCT NCT00292591

    Evaluation of Vitamin D Requirements During Pregnancy

    Not yet reported Medical University of South Carolina 501 participants Est. completion 2010-01 1 site
    Other conditions: Vitamin D Deficiency
    View official trial listing →
  • Completed NCT NCT00412074

    Establishing the Vitamin D Requirements During Lactation

    Not yet reported Medical University of South Carolina 460 participants Est. completion 2012-10 2 sites
    Other conditions: Vitamin D Deficiency
    View official trial listing →
  • Completed NCT NCT00412087

    Vitamin D Status of Pregnant Women and Their Children in Eau Claire, South Carolina

    Not yet reported Medical University of South Carolina 564 participants Est. completion 2009-07 1 site
    Other conditions: Vitamin D Deficiency, Pregnancy
    View official trial listing →
  • Completed NCT NCT01052051

    Clinical Trial of Vitamin D3 to Reduce Cancer Risk in Postmenopausal Women

    Not yet reported, Not yet reported Creighton University 2303 participants Est. completion 2015-08 1 site Stand-alone
    Other conditions: Cancer
    View official trial listing →
  • Completed NCT NCT01349127

    Trial to Assess Vitamin D Requirements in Lactating Women

    Not yet reported University College Cork 136 participants Est. completion 2009-12 1 site
    Other conditions: Vitamin D Deficiency, Vitamin D Insufficiency
    View official trial listing →
  • Terminated NCT NCT01499940

    Study to Assess Prevention of Oxaliplatin-induced Neurotoxicity Through Vitamin D Pathway

    Not yet reported Gerald Higa, PharmD. 9 participants Est. completion 2012-12 1 site Stand-alone
    Other conditions: Neurotoxicity
    View official trial listing →
  • Completed NCT NCT01630213

    Impact of Vitamin D Supplementation on Cardiac Structure and Function

    Not yet reported Massachusetts General Hospital 1025 participants Est. completion 2021-06-30 1 site
    Cardiovascular disease
    View official trial listing →
  • Completed NCT NCT01695460

    A Randomized, Parallel, Double-blind, Placebo-controlled Study of Vitamin D as Prophylactic Treatment for Migraine

    Not yet reported Aalborg University 48 participants Est. completion 2015-12 2 sites
    Other conditions: Migraine According to International Headache Society (IHS) Criteria (ICHD-II)
    View official trial listing →
  • Completed NCT NCT01875757

    Effect of Supplementation With Vitamin D on the Acute Bronchitis Prevention During the First Year of Life

    Not yet reported Hospital Universitari Vall d'Hebron Research Institute 200 participants Est. completion 2016-12 1 site
    Other conditions: Acute Bronchitis, Upper Respiratory Tract Infection, Acute Bronchiolitis
    View official trial listing →
  • Completed NCT NCT01990872

    Inter-relationship Between Vitamin D Requirements and Calcium Intake in Older Adults

    Not yet reported University College Cork 125 participants Est. completion 2013-11 1 site
    Other conditions: Vitamin D Deficiency
    View official trial listing →
  • Status unknown NCT NCT02551835

    Vitamin D Supplements on Markers for Cardiovascular Disease and Diabetes: an Individual Participant Data Meta-analysis

    Amsterdam UMC, location VUmc 2945 participants Est. completion 2016-08
    Other conditions: Vitamin D Deficiency, Vitamin; Excess Vitamin D (Nutritional)
    View official trial listing →
  • Completed NCT NCT02856776

    Gene Expression, Metabolomic, Microbiome, and Calcium Metabolism in Response to Varied Vitamin D Dosages

    Not yet reported Boston University 39 participants Est. completion 2018-08-06 1 site
    Other conditions: Vitamin D Insufficiency
    View official trial listing →
  • Active, not recruiting NCT NCT04482673

    Vitamin D Supplementation in the Prevention and Mitigation of COVID-19 Infection

    Not yet reported Medical University of South Carolina 95 participants Est. completion 2023-12-31 1 site
    Other conditions: COVID-19, Vitamin D Deficiency, Respiratory Viral Infection
    View official trial listing →
  • Not yet recruiting NCT NCT07892170

    Effect of Vitamin D Supplementation Added to Iron Therapy in Children With Iron Deficiency Anemia

    Not yet reported AlFayhaa General Hospital 120 participants Est. completion 2027-05 1 site Stand-alone
    Other conditions: Iron Deficiency Anemia
    View official trial listing →
Efficacy history

Not yet reported.

Safety

Not yet reported.

Sources

Also known as: Vitamin D3 /day, Vitamin D3 2000 IU/day, Vitamin D3 400 IU/day

Related On The Pen coverage

No related coverage yet.

This drug may be investigational and not yet approved for any use. Whether someone can join a clinical trial is determined only by that trial's own study team — On The Pen does not determine eligibility. Information here can change; always confirm current details on the official ClinicalTrials.gov listing or with the sponsor.