Sun Protection
Conditions
Brief summary
The investigators aim to investigate how much two consecutive applications of sunscreen before sun exposure can increase the quantities of sunscreen applied and decrease the skin area left without sunscreen compared to a single application. Volunteers wearing swimwear applied sunscreen in a laboratory environment twice and had pictures taken in black light before and after. As sunscreens absorb black light the darkness of the skin increased with increasing amounts of sunscreen applied. The investigators conducted a standard curve establishing a link between picture darkness and applied sunscreen quantity. Participants were asked to apply sunscreen the way they would normally do but two consecutive times. No other advice was given. The level of protection was determined by picture analysis as measurements of darkness of selected skin sites as well as the percentages of skin area left without sunscreen in different body regions and in total.
Interventions
OTHERSunscreen, Actinica
Two Consecutive Sunscreen Applications
Sponsors
Bispebjerg Hospital
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
PREVENTION
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
* Healthy Caucasians between older than 18
Exclusion criteria
* Suffering from a skin disease, were allergic to the content in sunscreen, were pregnant or breastfeeding
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Sun protection | The day of intervention. Sun protection will be assessed right after sunscreen application. | Sun protection will be determined as sunscreen quantities applied in mg/cm\^2 and areas of covered skin in percentage. |
Outcome results
None listed