Does Sunbed Radiation With Mainly UVA Provoke Cutaneous Vitamin D Synthesis in Humans?

Sunbed Radiation Provoke Cutaneous Vitamin D Synthesis in Humans, a Randomized Controlled Trial

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT00516867

Enrollment

Registered

2007-08-16

Start date

2006-02-28

Completion date

2006-04-30

Last updated

2007-08-16

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy

Brief summary

We would investigate in a controlled, randomized open study in the winter season: 1) If serum levels of vitamin D (25(OH)D) increase in subjects treated with sunbed with sunlamps emitting mainly UVA and only 0·5% or 1·4% UVB compared to non-sunbed treated controls 2) If yes, are the 25(OH)D serum levels then dependent on the UVB dose?

Interventions

RADIATIONUV radiation

UV radiation with 99.5% UVA and 0.5%UVB

Study design

Allocation

RANDOMIZED

Intervention model

SINGLE_GROUP

Primary purpose

BASIC_SCIENCE

Masking

NONE

Eligibility

Sex/Gender

FEMALE

Age

18 Years to No maximum

Healthy volunteers

Yes

Inclusion criteria

* Healthy * Females * Above 50 years * Younger with serum concentration of 25(OH)D below 50nmol/l

Exclusion criteria

* No sunbed use last ½ year * No sun holiday last ½ year * No intake of vitamin D above 10 microgram/day

Design outcomes

Primary

Measure	Time frame
Serum concentration of 25(OH)D	18 Days

Secondary

Measure	Time frame
Serum concentration of PTH	18 Days

Countries

Denmark

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026