Sunscreen: Persistence of Sun Protection Factor and the Influence on Vitamin D
Not Applicable
- Conditions
- Vitamin D Production in the SkinSunscreen Persistence
- Interventions
- Radiation: UVB lightOther: sunscreen MATAS sunlotion SPF 8
- Registration Number
- NCT00711256
- Lead Sponsor
- Bispebjerg Hospital
- 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.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- UNKNOWN
- Sex
- All
- Target Recruitment
- 80
Inclusion Criteria
- Healthy participants.
- > 18 years.
- Skin type I, II, and III.
Exclusion Criteria
- 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.
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- FACTORIAL
- Arm && Interventions
Group Intervention Description 1 UVB light No sunscreen applied 2 UVB light Sunscreen applied 0.5 mg/cm2 3 UVB light Sunscreen applied 1mg/cm2 4 sunscreen MATAS sunlotion SPF 8 Sunscreen applied 2mg/cm2 4 UVB light Sunscreen applied 2mg/cm2
- Primary Outcome Measures
Name Time Method vitamin D (nmol) meassured in a blood sample. 5 days after sunscreen use and UV light exposure
- Secondary Outcome Measures
Name Time Method
Trial Locations
- Locations (1)
Bispebjerg Hospital
🇩🇰Copenhagen, Kbh Nv, Denmark