Information on Vitamin D Synthesis / Erythemal UV



The National Institute for Environmental Studies has a network of UV monitoring stations consisting of 5 own stations and other cooperating institutes in Japan, and monitors harmful ultraviolet radiation continuously. However, UV radiation has a merit for vitamin D synthesis in human skin. Our group has developed a system to estimate the UV radiation necessary for vitamin D synthesis, as well as the amount of vitamin D synthesized in the body, and started to provide these data on the website.

What's New

New stations have been added. Information of twelve stations are now on our website including mobile page.
Mobile page for information on Vitamin D Synthesis / Erythemal UV has been released. Enter the site from the left hand menu.
New information on Exposure Time for Vitamin D Synthesis / MED (Climatology) has been released on our website for 5 stations in Japan.


Office for Global Environmental Database,
Center for Global Environmental Research,
National Institute for Environmental Studies

  • Address : 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
  • Email : cgerdb_admin(at)
  • FAX : +81-29-858-2645