Effectivity of using a low-dose UVB lighting solution to maintain healthy vitamin D levels
- Conditions
- Vitamin D deficiencyNutritional, Metabolic, Endocrine
- Registration Number
- ISRCTN47902923
- Lead Sponsor
- Signify (Netherlands)
- Brief Summary
2023 Results article in https://doi.org/10.1371/journal.pone.0283176 (added 03/04/2023)
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- Completed
- Sex
- All
- Target Recruitment
- 28
1. Aged =18 years
2. Fitzpatrick skin type II or III
3. Living in/around Eindhoven
4. Medically fit to work the hours as contractually agreed
5. Desk presence (at the home office) of at least 2.5 days per week during the 8 weeks study
6. Finding it no problem to have blood drawn three times over a period of 8 weeks
1. Current pregnancy, breast feeding or a desire to become pregnant
2. Having children at home aged 10 years or younger
3. Having malignant skin conditions in the past or currently
4. Photosensitive medical conditions or photo-sensitising drugs
5. Users of medicines and/or crèmes mentioning in the prescription as side effect extra sensitivity to the sun/interaction with sun exposure
6. Planned use of sun beds, or sunbed use during the past 4 weeks
7. Currently taking or planning to take oral vitamin D3 supplements or have been taking D3 supplements during the past 4 weeks
8. High vitamin D levels at the start of the study (>375 nmol/l) which need medical attention
Study & Design
- Study Type
- Interventional
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method Serum 25(OH)D level measured using blood sampling and automated immunoassay at baseline, 4, and 8 weeks
- Secondary Outcome Measures
Name Time Method Sleep duration, midsleep timing, sleep quality, and fatigue measured using participant questionnaire at baseline, 4, and 8 weeks