I've raised my Vit D intake from 1000IU daily 4 yrs ago to 10,000IU daily this past year (excepting summer when I tan outside alot).

My levels tested at 43 for 5000 IU, which was below the 70 that my doctor wanted. I didn't test this fall with my other blood work, since I seem to be doing well.

This is a link discussing Vit D for PN:
http://neurotalk.psychcentral.com/sh...hlight=vitamin

I think low D also causes paresthesias, due to impaired calcium absorption.

You really need to be tested. That is the only way to figure out how much D3 to take. (average suggestion is 1000IU to raise your tests 10pts in US). Some people however need less and others more than this general recommendation.

Some of the food manufacturers are adding D3 to milk, and yogurt now. This is fairly new. But still it is very difficult to get enough from food today.

Just getting sun is not enough for elderly patients. It is believed that with age the ability to convert sunlight is impaired. For those taking Statins to lower cholesterol, it might be even more impaired.

Both hubby and I have found that adequate D3 supplements prevent colds and flu also.

New research keeps coming forward, at a fast pace now, and we'll know much more about D3 and health in the next few years.