Analysis of The Vitamin D Lamp model D/UV-F by KBD Inc./Sperti Sunlamps in PDF format (5 pages).
This study was funded by the Federal Government with a National Institutes of Health grant. A peer reviewed publication.
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Conclusions (listed on page 4)
In summary, the Sperti D/UV-Fluorescent lamp is efficacious in increasing 25(OH)D3 levels in healthy adults with Fitzpatrick skin types II and III after multiple exposures over a 4-week period, and provides an effective and relatively inexpensive method to improve vitamin D status...."