Two Consecutive Sunscreen Applications Optimize Sun Protection

Not Applicable

Completed

• Conditions: Sun Protection
• Interventions: Other: Sunscreen, Actinica

• Registration Number: NCT03033654
• Lead Sponsor: Bispebjerg Hospital

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.

Detailed Description

Not available

Study Timeline

• Study Start: 2015-02
• Primary Completion: 2015-02
• Study Completion: 2015-02
• Status Verified: 2017-01
• Study First Submitted: 2017-01-20
• Study First Submitted QC: 2017-01-26
• Last Update Submitted: 2017-01-26
• Study First Posted: 2017-01-27
• Last Update Posted: 2017-01-27

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 31

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

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Intervention	Sunscreen, Actinica	Two Consecutive Sunscreen Applications

Primary Outcome Measures

Name	Time	Method
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.