VIT D insufficiency and general wellbeing by bringing the benefits of natural daylight inside (i.e. ultra small dose UV-B for VIT D) VIT D insufficiency
Conditions
Interventions
The individual workspaces of 14 office workers will be equipped with the
desk-based intervention light and subsequently be exposed to a low dose of
artificial UVB during daytime hours with a maximum
Sponsors
Signify research (previously Philips Research)
Eligibility
Age
18 Years to 99 Years
Inclusion criteria
Inclusion criteria: * Age over 18 years old * Fitzpatrick skin type II or III * Desk presence of at least 2,5 days per week during the 8 weeks study period or at least 4 days present in the office. * Medically fit to work the hours as contractually agreed
Exclusion criteria
Exclusion criteria: * * Current pregnancy, breast feeding or a desire to become pregnant * Office workers with malignant skin conditions in the past or currently * Photosensitive medical conditions or photo-sensitising drugs * Users of medicines and/or cremes mentioning in the prescription as side effect extra sensitivity to the sun * Planned use of sun beds, or sunbed use during the past 4 weeks * Currently taking or planning to take oral vitamin D3 supplements or have been taking D3 supplements during the past 4 weeks. * High vitamin D levels at the start of the study (>375 nmol/L) which need medical attention
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| The main study parameter is the difference in 25(OH)D serum levels. | — |
Secondary
| Measure | Time frame |
|---|---|
| self reported indicators of sleep timing, sleep quality and general levels of fatigue. | — |
Countries
Netherlands
Outcome results
None listed