General Discussion / Re: Nude sunbathing testosterone rises 200%
« on: August 13, 2010, 10:53:10 pm »Not entirely sure where I read this - I think possibly mercola.com but potentially other medical websites I read. You're absolutely right though, it does depend on the person but I think mainly down to skin type and pigmentation. There is a specific amount of sun you need depending on various factors such as skin type, time of day, latitude, cloud cover etc. in order to produce appropriate amounts of vitamin d - anything after that is not necessary. In some places, at some times of year, that could mean spending the whole day in the sun, in other places at other times of year it could be 10 or 20 minutes, even if you're dark skinned. Getting burned is bad for you but the easiest solution is to get out of the sun - the point about being in the sun when it's at its most intense is to do with getting balanced UVA and UVB rather than with getting really strong sun or large amounts of sun.
I came across a sun exposure calculator a while back, created by the Norwegian Institute for Air Research, that can help you work out how much time you need in the sun depending on where you are in the world, time of day, skin type etc. See my post here: http://www.rawpaleoforum.com/general-discussion/how-much-time-do-you-spend-in-the-sun-each-day-and-other-associated-thoughts/msg40650/#msg40650