The following is just a single slide from a presentation by Dr. Vieth May 2011

Green line = 20 ng/ml = supposed OK vitamin D level defined by IoM Nov 2010

It appears that Canadians lacking European ancestors are not able to adjust to the low levels of vitamin D in the winter 

Many groups have defined 30 ng/ml = 75 nmol/ml on the chart = minimum

Another chart by Dr.Vieth 2011

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See also VitaminDWiki

• CLICK HERE to access entire presentation
• All items: Far from Equator 124 items
• Chart of Vitamin D levels vs race - April 2013
• Canadian Vitamin D deficiency – May 2011 - lots of material
• 90 percent of Canadian youth less than 30 ng vitamin D – Oct 2010
• 75 percent of Canadians less than 30 ng vitamin D in winter – Aug 2010
• All item in Genes and vitamin D 344 items
• Genetic influence on Vitamin D is small compared to environmental influence – July 2011
• Genes affect vitamin D processing in many places - 2010
• Genes May Play a Role in Vitamin D Deficiency – June 2010
• Epigenetics and vitamin D – June 2010 clips from the web
• 229 Genes related to vitamin D - Aug 2010
• Vitamin D Genes varied seasonally with European but not Asian ancestors – June 2011
• Dark Skinned youths and vitamin D in Southern Canada - Dissertation 2011
• Blacks may need less vitamin D than whites – PTH Aug 2010
• All items in Skin Color and vitamin D 468 items
• Overview Dark Skin Vitamin D
• The darker the skin the less the vitamin D – July 2010
• Lack of vitamin D closely associated with black health disparities – Nov 2010 - Great charts
• Perhaps just 40 ng of vitamin D if high latitude or dark skin
• Vitamin D insufficiency in UK youths – 37X more likely if dark skin – July 2011
• Blacks may need less vitamin D than whites – PTH Aug 2010
• Striking ethnic health disparity – blacks dying due to lack of vitamin D – Nov 2011
• Do blacks have a 5 year life penalty due to low vitamin D
• Improved blood flow in blacks with just 2000 IU of vitamin D – Feb 2011
• Blacks may not need as much Vitamin D many articles
• Hypothesis that lack of vitamin D increases blood pressure in blacks – July 2010
• 88 percent of African immigrants to Melborne had less than 20 ng of vitamin D
• Vitamin D Council vs FDA concerning vitamin D deficiency in blacks and others - June 2011
• Dark skinned obese not helped much by weekly 50000 IU dose of vitamin D – May 2011
• 82 percent of black US adults less than 20 ng of vitamin D – Jan 2011