[R.B.]

so how much vitamin D should someone take and what happens if you take too much?

That is the big question that is debated by the medical profession.

It in part depends on how much midday sun you get where you live skin colour etc. You cannot overdose from sunshine. But sun bathing in a polluted environment northern latitude etc maybe a bit of a waste in vitamin D terms. But how much you need in part depends on how much you are getting from the sun.

400 iu some say, but given the amount a Caucasian can make in 20 mins of full body exposure 20-50,000 units that does not seem very much.

http://www.uctv.tv/search-details.aspx?showID=15771

If you listen to this from 38 mins it may help - this is about diabetes. They give recommendations at the end as to intakes.

Linus Pauling also recommend 2000 IU http://lpi.oregonstate.edu/infocente...mins/vitaminD/


At what level the negative effects start is not clear

http://www.solarien-verbaende.de/pdf/studien_2.pdf

Side effects are listed here but they cite a 1000iu upper limit, which is at odds with the above.

And then you have the discussions about the need to balance A and D.

http://enzyme-health.blogspot.com/20...-counters.html

But the question I have is what happens in nature where you are getting lots of vit D from sun, how would you be increasing your vit A intake.




Ultimately the best thing is to get tested and adjust your intake to achieve your desired level.

Please discuss dietary change with your doctor. I can only inform debate and cannot give advice.