{ "api_version": "1", "request": { "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=25%28OH%29D3", "query": { "intervention": "25(OH)D3" }, "page_size": 10 }, "pagination": { "page": 1, "page_size": 10, "total_count": 44, "total_pages": 5, "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=25%28OH%29D3&page=2&page_size=10", "previous_page_url": null }, "source": "remote", "last_synced_at": "2026-09-24T23:44:58.777Z", "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.", "notes": [ "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.", "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.", "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees." ], "trials": [ { "nct_id": "NCT03104855", "title": "Clearance of 25-hydroxyvitamin D in Cystic Fibrosis", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Cystic Fibrosis" ], "interventions": [ { "name": "d6-25-hydroxyvitamin D3", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "University of Washington", "sponsor_class": "OTHER", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 10, "start_date": "2017-04-03", "completion_date": "2023-09-06", "has_results": true, "last_update_posted_date": "2023-10-12", "last_synced_at": "2026-09-24T23:44:58.777Z", "location_count": 1, "location_summary": "Seattle, Washington", "locations": [ { "city": "Seattle", "state": "Washington" } ], "official_url": "https://clinicaltrials.gov/study/NCT03104855" }, { "nct_id": "NCT04885803", "title": "Vitamin D Absorbance Study - Clinical Trial of the Absorbance of Nano Liquid D3", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "NA" ], "conditions": [ "Vitamin D Deficiency" ], "interventions": [ { "name": "Softgel Vitamin D3", "type": "DIETARY_SUPPLEMENT" }, { "name": "Nano Liquid Vitamin D3", "type": "DIETARY_SUPPLEMENT" }, { "name": "25(OH)D Blood Serum Test", "type": "DIAGNOSTIC_TEST" }, { "name": "Placebo Control", "type": "OTHER" } ], "intervention_types": [ "DIETARY_SUPPLEMENT", "DIAGNOSTIC_TEST", "OTHER" ], "sponsor": "Inspired Life Medical, Inc.", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "70 Years", "sex": "ALL", "summary": "18 Years to 70 Years" }, "enrollment_count": 114, "start_date": "2021-03-26", "completion_date": "2021-07-30", "has_results": false, "last_update_posted_date": "2021-08-24", "last_synced_at": "2026-09-24T23:44:58.777Z", "location_count": 1, "location_summary": "Le Sueur, Minnesota", "locations": [ { "city": "Le Sueur", "state": "Minnesota" } ], "official_url": "https://clinicaltrials.gov/study/NCT04885803" }, { "nct_id": "NCT05016310", "title": "A Study of High-Dose Vit D Versus Standard of Care Vit D Supplementation", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "NA" ], "conditions": [ "Breast", "Breast Cancer", "Osteoporosis" ], "interventions": [ { "name": "High Dose Vitamin D", "type": "DIETARY_SUPPLEMENT" }, { "name": "Standard of Care Vitamin D", "type": "DIETARY_SUPPLEMENT" } ], "intervention_types": [ "DIETARY_SUPPLEMENT" ], "sponsor": "Wake Forest University Health Sciences", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": "45 Years", "sex": "FEMALE", "summary": "18 Years to 45 Years · Female only" }, "enrollment_count": 7, "start_date": "2021-09-16", "completion_date": "2024-08-15", "has_results": false, "last_update_posted_date": "2025-07-23", "last_synced_at": "2026-09-24T23:44:58.777Z", "location_count": 1, "location_summary": "Charlotte, North Carolina", "locations": [ { "city": "Charlotte", "state": "North Carolina" } ], "official_url": "https://clinicaltrials.gov/study/NCT05016310" }, { "nct_id": "NCT01141192", "title": "The Effect of Vitamin D Supplementation on Glucose Metabolism in Non-Diabetic African American Adults", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "NA" ], "conditions": [ "Type 2 Diabetes" ], "interventions": [ { "name": "vitamin D3, cholecalciferol", "type": "DIETARY_SUPPLEMENT" }, { "name": "Inactive comparator", "type": "DIETARY_SUPPLEMENT" } ], "intervention_types": [ "DIETARY_SUPPLEMENT" ], "sponsor": "Augusta University", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "19 Years", "maximum_age": "60 Years", "sex": "ALL", "summary": "19 Years to 60 Years" }, "enrollment_count": 48, "start_date": "2010-01", "completion_date": "2010-05", "has_results": false, "last_update_posted_date": "2010-06-10", "last_synced_at": "2026-09-24T23:44:58.777Z", "location_count": 1, "location_summary": "Augusta, Georgia", "locations": [ { "city": "Augusta", "state": "Georgia" } ], "official_url": "https://clinicaltrials.gov/study/NCT01141192" }, { "nct_id": "NCT01498406", "title": "Vitamin D Status, Disease Specific and Quality of Life Outcomes in Patients With Cutaneous Lupus", "overall_status": "TERMINATED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Cutaneous Lupus Erythematosus" ], "interventions": [ { "name": "vitamin D", "type": "DIETARY_SUPPLEMENT" } ], "intervention_types": [ "DIETARY_SUPPLEMENT" ], "sponsor": "Emory University", "sponsor_class": "OTHER", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 3, "start_date": "2011-12", "completion_date": "2013-06", "has_results": false, "last_update_posted_date": "2013-11-20", "last_synced_at": "2026-09-24T23:44:58.777Z", "location_count": 1, "location_summary": "Atlanta, Georgia", "locations": [ { "city": "Atlanta", "state": "Georgia" } ], "official_url": "https://clinicaltrials.gov/study/NCT01498406" }, { "nct_id": "NCT03401541", "title": "25-Hydroxyvitamin D Pharmacokinetic Study", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "EARLY_PHASE1" ], "conditions": [ "Vitamin D Deficiency", "Fat Malabsorption" ], "interventions": [ { "name": "Calcifediol", "type": "DRUG" }, { "name": "Calciferol", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Boston University", "sponsor_class": "OTHER", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 16, "start_date": "2018-10-01", "completion_date": "2019-11-01", "has_results": false, "last_update_posted_date": "2020-06-04", "last_synced_at": "2026-09-24T23:44:58.777Z", "location_count": 1, "location_summary": "Boston, Massachusetts", "locations": [ { "city": "Boston", "state": "Massachusetts" } ], "official_url": "https://clinicaltrials.gov/study/NCT03401541" }, { "nct_id": "NCT02954549", "title": "Vitamin D Supplementation in Warfighters", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "NA" ], "conditions": [ "Vitamin D Deficiency Disease" ], "interventions": [ { "name": "Vitamin D3", "type": "DIETARY_SUPPLEMENT" } ], "intervention_types": [ "DIETARY_SUPPLEMENT" ], "sponsor": "Madigan Army Medical Center", "sponsor_class": "FED", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 131, "start_date": "2016-01", "completion_date": "2018-06-29", "has_results": false, "last_update_posted_date": "2019-05-10", "last_synced_at": "2026-09-24T23:44:58.777Z", "location_count": 1, "location_summary": "Tacoma, Washington", "locations": [ { "city": "Tacoma", "state": "Washington" } ], "official_url": "https://clinicaltrials.gov/study/NCT02954549" }, { "nct_id": "NCT01688102", "title": "The Effect of Oral Vitamin D Versus Narrow-Band UV-B Exposure on the Lipid Profile", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "NA" ], "conditions": [ "Vitamin D Deficiency" ], "interventions": [ { "name": "Oral Vitamin D3", "type": "DIETARY_SUPPLEMENT" }, { "name": "Ultraviolet Light", "type": "RADIATION" } ], "intervention_types": [ "DIETARY_SUPPLEMENT", "RADIATION" ], "sponsor": "Rockefeller University", "sponsor_class": "OTHER", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "70 Years", "sex": "ALL", "summary": "18 Years to 70 Years" }, "enrollment_count": 118, "start_date": "2012-09", "completion_date": "2015-07", "has_results": true, "last_update_posted_date": "2017-11-06", "last_synced_at": "2026-09-24T23:44:58.777Z", "location_count": 1, "location_summary": "New York, New York", "locations": [ { "city": "New York", "state": "New York" } ], "official_url": "https://clinicaltrials.gov/study/NCT01688102" }, { "nct_id": "NCT03576716", "title": "Clearance of 25-hydroxyvitamin D3 During Vitamin D3 Supplementation", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Chronic Kidney Disease" ], "interventions": [ { "name": "D6-25-hydroxyvitamin D3", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "University of Washington", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 19, "start_date": "2018-06-01", "completion_date": "2021-01-01", "has_results": true, "last_update_posted_date": "2022-05-17", "last_synced_at": "2026-09-24T23:44:58.777Z", "location_count": 1, "location_summary": "Seattle, Washington", "locations": [ { "city": "Seattle", "state": "Washington" } ], "official_url": "https://clinicaltrials.gov/study/NCT03576716" }, { "nct_id": "NCT02362269", "title": "Personalized Vitamin D Supplementation in European and African Americans", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "NA" ], "conditions": [ "Vitamin D Deficiency" ], "interventions": [ { "name": "Vitamin D", "type": "DIETARY_SUPPLEMENT" } ], "intervention_types": [ "DIETARY_SUPPLEMENT" ], "sponsor": "University of Wisconsin, Madison", "sponsor_class": "OTHER", "healthy_volunteers": true, "eligibility": { "minimum_age": null, "maximum_age": null, "sex": "FEMALE", "summary": "Female only" }, "enrollment_count": 169, "start_date": "2015-10-30", "completion_date": "2019-05-03", "has_results": true, "last_update_posted_date": "2020-12-01", "last_synced_at": "2026-09-24T23:44:58.777Z", "location_count": 2, "location_summary": "Madison, Wisconsin • Milwaukee, Wisconsin", "locations": [ { "city": "Madison", "state": "Wisconsin" }, { "city": "Milwaukee", "state": "Wisconsin" } ], "official_url": "https://clinicaltrials.gov/study/NCT02362269" } ] }