Maintenance of Vitamin D Level by UVB Radiation

Bispebjerg Hospital75 enrolled

Overview

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

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.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

BASIC_SCIENCE

Masking

DOUBLE

Enrollment

Conditions

Vitamin D Status

Interventions

Broadband UVBRADIATION

UVB dose: 1 SED every week

Broadband UVBRADIATION

UVB dose: 4 SED every second week

Broadband UVBRADIATION

UVB dose: 1 SED every second week

Broadband UVB

Eligibility

Sex: ALLMin age: 18 YearsMax age: 65 YearsHealthy volunteers:

Medical Language ↔ Plain English

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

Locations (1)

Bispebjerg Hospital

Copenhagen, NV, Denmark

Outcomes

Primary Outcomes

Vitamin D (nmol/l)

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

Time frame: Monthly during 4 months

Secondary Outcomes

Parathyroideahormone (pmol/l)

To investigate whether parathyroideahormone is influenced by the UVB radiations.

Time frame: 4 months

Data from ClinicalTrials.gov

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