Sunscreen Persistence, Vitamin D Production in the Skin
Conditions
Keywords
Sunscreen, Application, Vitamin D, Sun protection factor, Clothing
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.
Interventions
OTHERsunscreen MATAS sunlotion SPF 8
RADIATIONUVB light
duration 4 times 1 minute radiation on the trunk.
Sponsors
Bispebjerg Hospital
Study design
Allocation
RANDOMIZED
Intervention model
FACTORIAL
Primary purpose
PREVENTION
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
Yes
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.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| vitamin D (nmol) meassured in a blood sample. | 5 days after sunscreen use and UV light exposure |
Countries
Denmark
Contacts
Primary ContactHans Christian Wulf, Dr.med
Backup ContactDitte Beyer, stud.med
Outcome results
None listed