http://www.grassrootshealth.net
A great summary chart
other charts are attached at the bottom of this page
See also VitaminDWiki
- Overview How Much vitamin D
- Is 50 ng of vitamin D too high, just right, or not enough
- How you might double your response to vitamin D
- How often might 50,000 IU vitamin D be taken - results of clinical trials
- Search VitaminDWiki for Grassroots or Grassrootshealth 818 items as of Jan 2013
- Response to Vitamin D: summary chart of 8 studies – March 2013
- Grassroots Health participants Vitamin D vs age, intake, and resulting level – Sept 2013