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Seriously though, I know its not very primal, but do you mind me asking dacec what your "no" is based upon?
Frankly I don't like them because they are artificial and have very little regulation. I think the natural sun is a much better option, just like I prefer real fruit added to my plain yogurt vs fruity flavored yogurt.
In a pinch I only came up with this one link.... hopefully you will find some value in it. Otherwise you can Google sun vs tanning beds, the only trouble is there is a lot of sunscreen worshiping info out there that I don't agree with.
Some people live in areas of the world where they can't "get out and get some sunshine" for large parts of the year. I too considered the tanning beds, but think suplementation will do more good for the grey, foggy -40 C winters where I live.
The more I see the less I know for sure.
But I'm not sure, so... can you get any Vit D by going on a sunbed?
Am thinking about using them if so.
Yes, but only the older high UVB beds. The newish (since the 90's) 'high pressure' beds are nearly all UVA so they will be very effective at causing deep photodamage and mutating cells (think melanoma) but will offer no Vitamin D boost.
See my D doc below for some information on D , D levels, Testing etc and see the vitamindcouncil.org for alllllll things D related.