Comment on The essential guide to vitamin D and the sun by Holly.
Wonderful post, thank you!
There is an app called dminder that you can download on your phone. If you give the app access to your location, it will automatically pick up the UVB emitted over the course of the day wherever in the world you are (or tell you when next there will be UVB emitted in your area). You can also log your sun exposure time to estimate how much Vitamin D your skin is synthesizing (it takes into account your Fitzpatrick skin type and how much of your skin is exposed). I don’t know how accurate the Vitamin D estimation is, but I enjoy knowing when there is good UVB exposure in my city 🙂
