CompletedNot Applicable

The Role of Narrowband Ultraviolet B Exposure in the Maintenance of Vitamin D Levels During Winter

Finland37 participantsStarted 2013-09

Plain-language summary

The investigators investigated the ability of narrowband ultraviolet B (nbUVB) treatment in the maintenance of vitamin D levels achieved during the summer in Finland. The investigators randomized 37 subjects into groups of 17 and 18 subjects. The other group received 2 standard erythema doses (SED) nbUVB exposure every other week until week 24, and serum 25(OH)D levels were measured at the onset and at weeks 6, 14, 20, 26 and 30. The control group was not illuminated and serum samples were analyzed correspondingly. Punch biopsies were taken at the onset and at week 14 for CYP27A1 and CYP27B1 enzyme expression level analyses.

Who can participate

Age range18 Years

SexALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion Criteria: * age over 18 * Fitzpacker's skin type II-IV Exclusion Criteria: * age under 18 * diseases that inhibit vitamin D metabolism or absorption * Fitzpacker's skin type I * history of skin cancer * vitamin D substitution 1 month before baseline or during study * sun holidays 1 month before baseline or during study

What they're measuring

25(OH)D level

Timeframe: up to 30 weeks

Trial details

NCT IDNCT02275650

SponsorJoint Authority for Päijät-Häme Social and Health Care

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2014-05

View on ClinicalTrials.gov More Vitamin D Deficiency trials