Sunscreen: Persistence of Sun Protection Factor and the Influence on Vitamin D
sunscreen
Sunscreen Removal by Clothing Meassured in Vivo. Sun Protection Factor Persistence During a Day Indoor Without Physical Activity. Does Sunscreen Reduce Vitamin D?
1 other identifier
interventional
80
1 country
1
Brief Summary
The investigators want to investigate whether sunscreen is removed by clothing and to what extend when the amount of sunscreen applied varies.Does clothing reduce the SPF when clothes are put on 20, 8, or 4 minutes after sunscreen application? The investigators also want to investigate the persistence of sunscreen during eight hours indoor. How much does the SPF reduces? Furthermore, we want to investigate whether sunscreen in the layers 2, 1, and 0.5 mg/cm2 reduce the vitamin D production in the skin.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P50-P75 for not_applicable
Started Jul 2008
Shorter than P25 for not_applicable
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
Study Start
First participant enrolled
July 1, 2008
CompletedFirst Submitted
Initial submission to the registry
July 7, 2008
CompletedFirst Posted
Study publicly available on registry
July 8, 2008
CompletedPrimary Completion
Last participant's last visit for primary outcome
August 1, 2008
CompletedStudy Completion
Last participant's last visit for all outcomes
November 1, 2008
CompletedJuly 8, 2008
April 1, 2008
1 month
July 7, 2008
July 7, 2008
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
vitamin D (nmol) meassured in a blood sample.
5 days after sunscreen use and UV light exposure
Study Arms (4)
1
ACTIVE COMPARATORNo sunscreen applied
2
ACTIVE COMPARATORSunscreen applied 0.5 mg/cm2
3
ACTIVE COMPARATORSunscreen applied 1mg/cm2
4
ACTIVE COMPARATORSunscreen applied 2mg/cm2
Interventions
Eligibility Criteria
You may qualify if:
- Healthy participants.
- \> 18 years.
- Skin type I, II, and III.
You may not qualify if:
- Pregnancy.
- Medicin use.
- Skin or other diseases.
- The participants must not have been in solarium or gotten sun on their trunks in the 3 months before the study start and during the study.
- Skin types IV and above.
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (1)
Bispebjerg Hospital
Copenhagen, KBH NV, 2400, Denmark
Related Publications (1)
Beyer DM, Faurschou A, Philipsen PA, Haedersdal M, Wulf HC. Sun protection factor persistence on human skin during a day without physical activity or ultraviolet exposure. Photodermatol Photoimmunol Photomed. 2010 Feb;26(1):22-7. doi: 10.1111/j.1600-0781.2009.00479.x.
PMID: 20070835DERIVED
Central Study Contacts
Study Design
- Study Type
- interventional
- Phase
- not applicable
- Allocation
- RANDOMIZED
- Masking
- NONE
- Purpose
- PREVENTION
- Intervention Model
- FACTORIAL
- Sponsor Type
- OTHER
Study Record Dates
First Submitted
July 7, 2008
First Posted
July 8, 2008
Study Start
July 1, 2008
Primary Completion
August 1, 2008
Study Completion
November 1, 2008
Last Updated
July 8, 2008
Record last verified: 2008-04