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Vitamin D Blog

Vitamin D roundup of recent IU

Thursday January 12, 2012

Most countries recommend only a small amount of vitamin D
But recent studies and random controlled trials show that much more is needed

300 IU Finland RDA – 2011 includes differences for age, pregnancy, UL,
800 IU Germany increased from 200 IU - Jan 2012 no indication of upper limit
800 IU European Menopause Group – Jan 2012
800 IU: Cochrane – decreased mortality by 6 percent – July 2011
1340 IU avg daily vitamin D during pregnancy helped some – Jan 2012
1600 IU daily Vitamin D raised adult blood levels above 20 ng – RCT Nov 2011
1650 IU avg daily helped those lacking sun – Jan 2012
2000 IU Linus Pauling Institute – 2011
2000 IU improved telomeres for obese blacks – Oct 2011
2000+ IU needed by people with no UV for 6 months in the winter – April 2011
2000 IU resulted in 7X less diabetes in children
2400 IU of avg daily reduced systolic blood pressure – Jan 2012
4000 IU needed by obese teens - Nov 2011
5000 IU for patients older than 65 – May 2010
5000 IU raised young adult vitamin D levels by 10 ng – Nov 2011
5700 did not TREAT Diabetes – Sept 2011
6667 IU to prevent falls/fractures: given by Fraser Health in Canada – fall 2011
9600 IU needed to get most people to 40 ng – with graph Feb 2011
20000 IU => less MS fatigue and relapse Dec 2010

IoM and Endocine recommendations graph

Vitamin D Recommendations in IU and ng has the preceding and following charts


from Dietary Guidelines for Americans vitamin D - June 2010

Note that very few Americans ACTUALLY get the RDA (minimum) 600 or 800 IU (multiply ug by 40 to get IU)

Overview How Much vitamin D has the following graphic

Need to add vitamin D for at least each of the following reasons

IU of vitamin D to add vs X

Summary of Vitamin D trials - Grant Jan 2012 mentioned in previous blog post summarizes many Random Controlled trials

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Vitamin D Life has a lot more information