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OpenUV Knowledge Base

Collection of useful tips and articles about Sun Safety and Ultraviolet Radiation Index for Developers


Vitamin D and UV Radiation

Vitamin D is a hormone that controls calcium levels in the blood. It is needed to develop and maintain healthy bones, muscles and teeth and is also important for general health. The human body can get vitamin D in two ways: diet or sun exposure.

Minutes for sunlight exposure for sufficient Vitamin D intake *:

Skin TypeIIIIIIIVVVI
Low UV15-20m20-30m30-40m40-60m60-80m-
Mod UV10-15m15-20m20-30m30-40m40-60m60-80m
High UV5-10m10-15m15-20m20-30m30-40m40-60m
V High UV2-8m5-10m10-15m15-20m20-30m30-40m
Extr UV1-5m2-8m5-10m10-15m15-20m20-30m