Comparison of Sunlight Exposure and Vitamin D Supplementation on Serum 25-hydroxyvitamin D Levels
NCT ID: NCT03310242
Last Updated: 2017-10-31
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
NA
150 participants
INTERVENTIONAL
2015-06-01
2015-11-30
Brief Summary
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Detailed Description
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Conditions
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Study Design
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RANDOMIZED
PARALLEL
TREATMENT
QUADRUPLE
Study Groups
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Sunlight Exposure
Everyday sunlight exposure around noon for 20-30 minutes for 8 weeks
Sunlight Exposure
* Everyday sunlight exposure around noon for 20-30 minutes for 8 weeks
* Completing a Sun Diary after sunlight exposure
Vitamin D Supplementation
Supplementation of vitamin D3 500 IU/day for 8 weeks
Vitamin D Supplementation
\- Supplementation of vitamin D3 500 IU/day for 8 weeks
Placebo
Intake of placebo for 8 weeks
Placebo
\- Intake of placebo for 8 weeks
Interventions
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Sunlight Exposure
* Everyday sunlight exposure around noon for 20-30 minutes for 8 weeks
* Completing a Sun Diary after sunlight exposure
Vitamin D Supplementation
\- Supplementation of vitamin D3 500 IU/day for 8 weeks
Placebo
\- Intake of placebo for 8 weeks
Eligibility Criteria
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Inclusion Criteria
* age between 18 and 39 years
* Korean men and women
Exclusion Criteria
* Photosensitivity or UV allergy
* History of hyperparathyroidism/hypercalciuria/kidney stone/skin cancer and other cancer
* Under medication for hypertension, dyslipidemia, and diabetes
* Intake of photosensitive medicine during study period
* Exposure of strong UV (e.g., beach, sun tanning) during study period
* Pregnant/breast-feeding women
18 Years
39 Years
ALL
Yes
Sponsors
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Seoul National University Hospital
OTHER
Responsible Party
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Principal Investigators
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Hee-Kyung Joh, PhD
Role: PRINCIPAL_INVESTIGATOR
Seoul National University College of Medicine/Seoul National University Hospital
References
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Joh HK, Hwang SS, Cho B, Lim CS, Jung SE. Effect of sun exposure versus oral vitamin D supplementation on serum 25-hydroxyvitamin D concentrations in young adults: A randomized clinical trial. Clin Nutr. 2020 Mar;39(3):727-736. doi: 10.1016/j.clnu.2019.03.021. Epub 2019 Mar 21.
Other Identifiers
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H-1504-112-668
Identifier Type: -
Identifier Source: org_study_id