2Oct/102
How much sun exposure for vitamin D production?
Searching the internet, we found reputable medical sites recommending 10-15 minutes of sun exposure about 3 times a week for minimum vitamin D production. However, nowhere do they say how much skin must be exposed. We live in an area that gets lots of sun most days of the year, but also long, cold winters where we have very little skin exposed outdoors. (We are probably getting adequate amounts of dietary vitamin D but are curious about the sun-exposure issue.) Thanks.
October 2nd, 2010 - 10:47
http://www.mercola.com is one of the best sources for information on vitamin D.
You should try to get 20 mins every day with 40% skin exposure.
I’m curious to know what dietary sources you are talking about. A recent study was published showing that vitamin D2, the form used to fortify foods and milk, is low quality and has an immune suppressing activity in the body.
During winter, it is wise to supplement with vitamin D3, either straight, or through cod liver oil.
October 2nd, 2010 - 10:47
Fair skinned people can get enough vitamin D in summer from a few minutes of sunlight on their face, arms and hands before 10am or after 3pm on most days of the week.
In winter in South Australia, when UV radiation levels are below 3, people need about two to three hours of sunlight to their face, arms and hands over a week.
Hoped that answered your question.