I've been wondering how much D3 to take. I live in a sunny clime but I am photosensitive so I stay out of the sun. I'm currently taking 4,000 iu. I think that is about the right dose given that I really don't have any stores to draw on and that one article says a healthy man uses 3,000-5,000 iu per day.

Any suggestions? It sounds like up to 10,000 iu is probably safe.