Re: This might help!

The recommended variety of vitamin D is D3 by most medical professionals.  (Here's an excellent source on vitamin D research - http://www.vitamindcouncil.org/)  I took 50,000 IU units of vitamin D3 daily for a year trying to prevent/reverse cancer.  It takes time for it to build up in your system so there is no "better" time of day.  I didn't find that it changed my sleep patterns at all.  I was mainly trying to reverse a tumor which was growing in my lung and it didn't do that either.  In fact, my blood tests started heading in the wrong direction (can't remember which element) and have cut back to 10,000 IU per day. 

Had my tumor removed from my lung three months ago and it was cancer.