Vitamin D Production Depends on Ultraviolet-B Dose But Not on UV-intensity. A Randomized Controlled Trial
The work is addressing vitamin D production after UVB exposure and explore the importance of
UVB dose and UV intensity. Four different UVB doses and four different UV intensities are
used to explore these relationships.
Many assumptions have been made concerning the vitamin D production after UVB exposure but
only few studies exist.
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator), Primary Purpose: Basic Science
Vitamin D (nmol/l)
Vitamin D measured in a blood sample to define the dose-response relationship between UVB dose, UV intensity and Vitamin D production in the skin after UVB exposure.
2 days after exposure
Hans Christian Wulf, Professor
Bispebjerg Hospital, Deparment of Dermatology
Denmark: The Danish National Committee on Biomedical Research Ethics