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Sunscreen: Persistence of Sun Protection Factor and the Influence on Vitamin D (sunscreen)

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified April 2008 by Bispebjerg Hospital.
Recruitment status was:  Recruiting
Information provided by:
Bispebjerg Hospital Identifier:
First received: July 7, 2008
Last updated: NA
Last verified: April 2008
History: No changes posted
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.

Condition Intervention
Vitamin D Production in the Skin
Sunscreen Persistence
Other: sunscreen MATAS sunlotion SPF 8
Radiation: UVB light

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Factorial Assignment
Masking: Open Label
Primary Purpose: Prevention
Official Title: Sunscreen Removal by Clothing Meassured in Vivo. Sun Protection Factor Persistence During a Day Indoor Without Physical Activity. Does Sunscreen Reduce Vitamin D?

Resource links provided by NLM:

Further study details as provided by Bispebjerg Hospital:

Primary Outcome Measures:
  • vitamin D (nmol) meassured in a blood sample. [ Time Frame: 5 days after sunscreen use and UV light exposure ]

Estimated Enrollment: 80
Study Start Date: July 2008
Estimated Study Completion Date: November 2008
Estimated Primary Completion Date: August 2008 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: 1
No sunscreen applied
Radiation: UVB light
duration 4 times 1 minute radiation on the trunk.
Active Comparator: 2
Sunscreen applied 0.5 mg/cm2
Radiation: UVB light
duration 4 times 1 minute radiation on the trunk.
Active Comparator: 3
Sunscreen applied 1mg/cm2
Radiation: UVB light
duration 4 times 1 minute radiation on the trunk.
Active Comparator: 4
Sunscreen applied 2mg/cm2
Other: sunscreen MATAS sunlotion SPF 8
Other Name: MATAS sollotion. Matas Denmark, 3400 Alleroed
Radiation: UVB light
duration 4 times 1 minute radiation on the trunk.


Ages Eligible for Study:   18 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts 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.
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Please refer to this study by its identifier: NCT00711256

Contact: Hans Christian Wulf, +45 3135 3155
Contact: Ditte Beyer, +45 2014 1423

Bispebjerg Hospital Recruiting
Copenhagen, Kbh Nv, Denmark, 2400
Contact: HC Wulf,    +45 3531 3155      
Contact: Ditte Beyer,    +45 2014 1423   
Principal Investigator: Ditte Beyer,         
Sponsors and Collaborators
Bispebjerg Hospital
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Bispebjerg Hospital. Dr. Hans Christian Wulf, Bispebjerg Hospital Identifier: NCT00711256     History of Changes
Other Study ID Numbers: H-B-2007-120
Study First Received: July 7, 2008
Last Updated: July 7, 2008

Keywords provided by Bispebjerg Hospital:
Vitamin D
Sun protection factor

Additional relevant MeSH terms:
Vitamin D
Sunscreening Agents
Growth Substances
Physiological Effects of Drugs
Bone Density Conservation Agents
Radiation-Protective Agents
Protective Agents
Dermatologic Agents processed this record on May 25, 2017