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Completed

NCT Number: NCT01101243

Maintenance of Vitamin D Level by UVB Radiation

The purpose of the study is to determine the frequency of UVB radiations necessary to maintain the Vitamin D level during winter time.

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Key information

Conditions

Vitamin D Status

Age range

18 year–65 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Bispebjerg Hospital

Copenhagen, NV, 2400, Denmark

About this study

The work is addressing vitamin D production after UVB exposure and explore how much UVB radiation which is necessary to maintain a sufficient vitamin D level during the winter period in Denmark. 4 different UVB exposure times and 2 different UVB doses to 2 different body surface areas.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • 18-65 years
  • Healthy

Exclusion criteria

  • Sun bed use
  • Holiday or business travel south of 45 degrees latitude during trial
  • Illness
  • Drug addiction
  • Pregnancy
  • Lactating

Treatment and study plan

Broadband UVB

Radiation

UVB dose: 1 SED every week

Control Group

Other

No intervention

Primary outcomes

  1. Vitamin D (nmol/l)

    Time frame: Monthly during 4 months

    Vitamin D measured in a blood sample to define the relationship between frequency of UVB radiations and the Vitamin D level.

Secondary outcomes

  1. Parathyroideahormone (pmol/l)

    Time frame: 4 months

    To investigate whether parathyroideahormone is influenced by the UVB radiations.

Sponsors and collaborators

Lead sponsor

Bispebjerg Hospital

Other

Collaborators

  • The Danish Medical Research Council

Registry information

Official study title

How Much UVB Radiation is Necessary to Maintain Summer Vitamin D Level During Winter?

Important dates

Study start
2008
Primary completion
2009
Study completion
2010
First posted
Apr 9, 2010
Registry last updated
Apr 9, 2010

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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