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25-hydroxyvitamin D

Showing 1 - 25 of >10,000
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Vitamin D Deficiency, Vitamin D Insufficiency Trial in Boston (UVB treatment)

Completed
Has Results
  • Vitamin D Deficiency
  • Vitamin D Insufficiency
  • UVB treatment
  • Boston, Massachusetts
    General Clinical Research Unit (GCRU) BU School of Medicine
Dec 2, 2022

25-hydroxyvitamin D Levels Trial in Amman (Dietary Supplement: Omega3-FA)

Completed
  • 25-hydroxyvitamin D Levels
  • Dietary Supplement: Omega3-FA
  • Amman, Jordan
    Mahmoud S Abu-Samak
Feb 23, 2022

Chronic Kidney Disease Trial in Seattle (D6-25-hydroxyvitamin D3)

Completed
Has Results
  • Chronic Kidney Disease
  • D6-25-hydroxyvitamin D3
  • Seattle, Washington
    University of Washington
May 14, 2022

Vitamin D Deficiency, 25-Hydroxyvitamin D3 Deficiency, Selective Trial in Cuernavaca (vitamin D-enhanced egg, Control)

Completed
  • Vitamin D Deficiency
  • 25-Hydroxyvitamin D3 Deficiency, Selective
  • vitamin D-enhanced egg
  • Control
  • Cuernavaca, Morelos, Mexico
    Instituto Nacional de Salud Pública
Oct 19, 2023

COVID-19 Vaccination on Serum 25-hydroxyvitamin D Level

Recruiting
  • Acne Vulgaris
  • +2 more
  • Blood test and skin evaluation
  • Taipei, Taiwan
    Department of Dermatology, National Taiwan University Hospital
Jun 8, 2022

Patients With Periodontitis (Stage III)

Completed
  • Vitamin D Deficiency
  • Periodontitis
  • taking a blood sample
  • Erzurum, None Selected, Turkey
    Ataturk University
Jun 1, 2022

Cystic Fibrosis Trial in Seattle (d6-25-hydroxyvitamin D3)

Active, not recruiting
  • Cystic Fibrosis
  • d6-25-hydroxyvitamin D3
  • Seattle, Washington
    University of Washington
Sep 27, 2021

Premature Infants Trial in Houston (Vitamin D, Placebo)

Active, not recruiting
  • Premature Infants
  • Vitamin D
  • Placebo
  • Houston, Texas
    Baylor College of Medicine / Texas Children's Hospital
Oct 6, 2022

Chronic Kidney Disease Trial in Seattle (D6-25-hydroxyvitamin D3)

Completed
Has Results
  • Chronic Kidney Disease
  • D6-25-hydroxyvitamin D3
  • Seattle, Washington
    University of Washington
Aug 31, 2021

Vitamin D Deficiency, Vitamin D Insufficiency Trial in Boston (UVB treatment, Sham comparator)

Recruiting
  • Vitamin D Deficiency
  • Vitamin D Insufficiency
  • UVB treatment
  • Sham comparator
  • Boston, Massachusetts
    BU School of Medicine
Mar 28, 2022

Secondary Hyperparathyroidism Trial in Baltimore (Teriparatide)

Completed
Has Results
  • Secondary Hyperparathyroidism
  • Baltimore, Maryland
    University of Maryland School of Medicine Division of Endocrinol
Mar 30, 2022

Osteoporosis Trial (MK-217A/Alendronate Sodium 70-mg/Vitamin D3 5600 IU Combination Tablet)

Completed
Has Results
  • Osteoporosis
  • MK-217A/Alendronate Sodium 70-mg/Vitamin D3 5600 IU Combination Tablet
  • (no location specified)
Feb 1, 2022

Vitamin D Status and Ovarian Reserve Markers

Completed
  • Subfertility, Female
  • Vitamin D
  • (no location specified)
Nov 16, 2021

Vitamin D Level in Recurrent PV

Recruiting
  • Recurrent Pityriasis Versicolor
  • Human 25-Hydroxyvitamin D3 (HVD3) ELISA Kit (96 well)
  • Cairo, Egypt
    Kasr Al Ainy Teaching Hospital
Sep 24, 2021

Multiple Sclerosis, Relapsing-Remitting, Adult ALL, Vitamin D3 Deficiency Trial (25(OH)D3, vitamin D3)

Not yet recruiting
  • Multiple Sclerosis, Relapsing-Remitting
  • +2 more
  • 25(OH)D3
  • vitamin D3
  • (no location specified)
Apr 16, 2022

Pregnancy and Effects on Pregnancy Related Disorders

Completed
  • Vitamin d Deficiency
  • +4 more
    • Vienna, Austria
      Department of Obstetrics and fetomaternal Medicine, Medical Univ
    Nov 16, 2020

    Psoriasis, Vitamin D Deficiency Trial in Tromsø (25-Hydroxyvitamin D, Placebo oral capsule)

    Completed
    • Psoriasis
    • Vitamin D Deficiency
    • 25-Hydroxyvitamin D
    • Placebo oral capsule
    • Tromsø, Norway
      University Hospital of North Norway
    Oct 7, 2020

    COVID 19 Trial in Tehran (Oral 25-Hydroxyvitamin D3)

    Unknown status
    • COVID 19
    • Oral 25-Hydroxyvitamin D3
    • Tehran, Iran, Islamic Republic of
      Tehran University of Medical Sciences
    Jun 10, 2020

    Vitamin D Deficiency, Fat Malabsorption Trial in Boston (Calcifediol, Calciferol)

    Completed
    • Vitamin D Deficiency
    • Fat Malabsorption
    • Boston, Massachusetts
      Solomon Carter Fuller Mental Health Center
    Jun 2, 2020

    Vitamin D Deficiency Trial in Jakarta Pusat (Cholecalciferol)

    Active, not recruiting
    • Vitamin D Deficiency
    • Jakarta Pusat, DKI Jakarta, Indonesia
      Cipto Mangunkusumo National Center General Hospital
    Sep 22, 2023

    Are Negatively Associated With Platelets Number inCohort of

    Completed
    • Obesity
      • Castellana Grotte, Bari, Italy
        National Institute of Gastroenterology IRCCS S. de Bellis
      Oct 18, 2019

      Bioavailability of Vitamin D(25(OH)D) and Omega-3 Fatty Acid

      Recruiting
      • Nutrition, Healthy
      • DHA/EPA bioenhanced chicken
      • 25(OH)D bioenhanced chicken
      • Ithaca, New York
        Human Metabolic Research Unit
      Jun 3, 2022

      Correlation Between Serum 25(OH)D Level and Pregnancy Outcome

      Recruiting
      • Vitamin D Deficiency
      • +2 more
      • Serum levels of vitamin D
      • Shanghai, Shanghai, China
        Renji Hospital Affiliated to Shanghai Jiao Tong University Schoo
      Apr 21, 2023

      Non-allergic Asthma, Obesity, Vitamin D Deficiency Trial in Mexico City (Vitamin D3 (25-hydroxy vitamin D))

      Recruiting
      • Non-allergic Asthma
      • +2 more
      • Vitamin D₃ (25-hydroxy vitamin D)
      • Mexico City, Mexico
        Hospital Infantil de México Federico Gómez
      Jun 24, 2022

      Polycystic Ovary Syndrome Trial in Cairo (aser puncture, ultraviolet radiatio, Metformin)

      Not yet recruiting
      • Polycystic Ovary Syndrome
      • aser puncture
      • +2 more
      • Cairo, Egypt
        Kasr Alainy medical school
      Aug 3, 2023