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ClinicalTrials.gov public records Last synced Nov 15, 2026, 7:33 AM EST

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Showing 25–41 of 41 matching trials from the live ClinicalTrials.gov search.

Filters: Intervention: 1000 IU D3 Clear all

Conditions: Hot Flushes, Menopause, Premature, Obesity, Vitamin D Deficiency
Interventions: Vitamin D, Placebo; Dietary Supplement · Other
Lead sponsor: Kaiser Permanente; Other
Eligibility: 40 Years to 60 Years · Female only
Enrollment: 23 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2010 – 2012
U.S. locations: 1
States / cities: Portland, Oregon

Conditions: Healthy
Interventions: Vitamin D3 1000 IU, Placebo Tablet; Dietary Supplement
Lead sponsor: University of Pittsburgh; Other
Eligibility: 8 Years to 14 Years
Enrollment: 157 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2008 – 2011
U.S. locations: 1
States / cities: Pittsburgh, Pennsylvania

Conditions: Mineral Absorption
Interventions: Vitamin D; Dietary Supplement
Lead sponsor: Baylor College of Medicine; Other
Eligibility: 4 Years to 8 Years
Enrollment: 60 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2009 – 2011
U.S. locations: 1
States / cities: Houston, Texas

Conditions: Parkinson Disease, Accidental Falls
Interventions: Vitamin D3, calcium, Placebo; Drug · Dietary Supplement · Other
Lead sponsor: VA Office of Research and Development; Federal
Eligibility: 50 Years to 99 Years
Enrollment: 101 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2011 – 2015
U.S. locations: 1
States / cities: Portland, Oregon

Conditions: Vitamin D Deficiency
Interventions: Vitamin D3; Dietary Supplement
Lead sponsor: Tufts University; Other
Eligibility: 9 Years to 14 Years
Enrollment: 691 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2011 – 2013
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Spinal Cord Injury, Bone Loss, Osteoporosis
Interventions: Alendronate, Calcium, Vitamin D; Drug · Dietary Supplement
Lead sponsor: Northwestern University; Other
Eligibility: 21 Years and older
Enrollment: 17 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2014 – 2016
U.S. locations: 1
States / cities: Chicago, Illinois

Conditions: Hypertension, Vitamin D Deficiency
Interventions: Cholecalciferol; Drug
Lead sponsor: Loyola University; Other
Eligibility: 25 Years to 45 Years
Enrollment: 5 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2018
U.S. locations: 1
States / cities: Maywood, Illinois

Conditions: Vitamin D Supplementation
Interventions: Supplemental Vitamin D; Drug
Lead sponsor: Boston Children's Hospital; Other
Eligibility: 11 Years to 18 Years
Enrollment: 56 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2008 – 2011
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Quality of Life, Body Mass Index
Interventions: MannaBears, AlgaeCal Calcium, Calcium carbonate, Vitamin D3; Dietary Supplement
Lead sponsor: Integrative Health Technologies, Inc.; Network
Eligibility: 5 Years to 19 Years
Enrollment: 200 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2013 – 2014
U.S. locations: 1
States / cities: San Antonio, Texas

Conditions: Osteoporosis
Interventions: BONISTEIN(R) bone blend, Placebo; Dietary Supplement
Lead sponsor: dsm-firmenich Switzerland AG; Industry
Eligibility: 45 Years to 55 Years · Female only
Enrollment: 70 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2007 – 2009
U.S. locations: 1
States / cities: Omaha, Nebraska

Conditions: Osteoporosis, Osteopenia
Interventions: Fiber Pill, Melatonin, Strontium citrate, Vitamins D3 and K2; Dietary Supplement
Lead sponsor: Duquesne University; Other
Eligibility: Female only
Enrollment: 23 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2013 – 2017
U.S. locations: 1
States / cities: Pittsburgh, Pennsylvania

Conditions: Male Osteoporosis
Interventions: Teriparatide or human parathyroid hormone (PTH) 1-34, Cinacalcet, placebo tablet, Calcium citrate tablet, Vitamin D3; Drug · Dietary Supplement
Lead sponsor: VA Office of Research and Development; Federal
Eligibility: 60 Years to 85 Years · Male only
Enrollment: 40 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2019 – 2025
U.S. locations: 1
States / cities: San Francisco, California

Conditions: Multiple Sclerosis, Vitamin D Deficiency
Interventions: Cholecalciferol; Drug
Lead sponsor: Johns Hopkins University; Other
Eligibility: 18 Years to 55 Years
Enrollment: 40 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2010 – 2013
U.S. locations: 1
States / cities: Baltimore, Maryland

Conditions: End Stage Renal Disease, Kidney Transplantation, Bone Loss, Fractures, Vascular Calcifications
Interventions: Vitamin D3, Calcitriol, Placebo; Drug
Lead sponsor: Columbia University; Other
Eligibility: 18 Years and older
Enrollment: 61 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2014 – 2016
U.S. locations: 1
States / cities: New York, New York

Conditions: Respiratory Infection
Interventions: High Dose Vitamin D, Standard Dose Vitamin D, Placebo, Usual Care; Drug · Dietary Supplement
Lead sponsor: University of Colorado, Denver; Other
Eligibility: 60 Years and older
Enrollment: 107 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2010 – 2016
U.S. locations: 1
States / cities: Aurora, Colorado

Conditions: Autistic Disorder
Interventions: Vitamin D3; Drug
Lead sponsor: Oregon Health and Science University; Other
Eligibility: 20 Years to 44 Years · Female only
Enrollment: 20 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2008 – 2016
U.S. locations: 1
States / cities: Oregon City, Oregon

Conditions: Vitamin D Deficiency
Interventions: Vitamin D2 in orange juice, Vitamin D3 in orange juice, Vitamin D2, Vitamin D3, Placebo; Dietary Supplement · Other
Lead sponsor: Boston University; Other
Eligibility: 18 Years and older
Enrollment: 86 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2006 – 2007
U.S. locations: 1
States / cities: Boston, Massachusetts

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The Role of Vitamin D in Menopause: Relationship to Menopausal Symptoms in Body Composition

Defining Vitamin D Insufficiency in School Age Children: A Randomized Placebo Controlled Trial of Vitamin D3

Evaluation of Calcium, Vitamin D, Magnesium, and Zinc Absorption in Children

Effects of Vitamin D in Parkinson's Disease (PD)

Impact of Vitamin D Supplementation on Cardiometabolic Risk Factors [The Daily D Health Study]

Effect of Alendronate on Bone in People With Chronic Spinal Cord Injury (SCI) Previously Treated With Teriparatide

Blood Pressure in Blacks and Calcium (BBC) and Vitamin D Study

Vitamin D Supplementation in Healthy Adolescents

Study of Parental Ratings of Quality of Life and Body Composition in 5-19 Year Olds While Participating in the Good NEWS 4 Kids Program

Investigation of the Effect of BONISTEIN(R) Bone Blend on Bone Mineral Density/Content and Biomarkers of Bone Health

Melatonin-Micronutrients for Osteopenia Treatment Study

Novel Combination Therapy for Osteoporosis in Men

Safety and Immunologic Effect of Low Dose Versus High Dose Vitamin D3 in Multiple Sclerosis

Bone Mass and Strength After Kidney Transplantation

Vitamin D Supplementation and Acute Respiratory Infection in Older Long-Term Care Residents

Vitamin D to Prevent Autism in Newborn Siblings

Availability of Vitamin D in Orange Juice