Our World in Data - Vitamin D deficiency map - 2023

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Vitamin D Fortification - 2024 book chapter

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VitaminDWiki – Overview Deficiency of vitamin D contains

FACT: Much of the world is now vitamin D deficient
OBSERVATION:There are many reasons that a person may be vitamin D deficient
11 of the reasons for the epidemic are new in the past 40 years, Example: Air Conditioning
OBSERVATION: The more reasons that apply to an individual, the more likely he is to be deficient (additive reasons)
FACT: Vitamin D Deficiency has been associated with many diseases

FACT: Vitamin D intake can be increased by supplements, injection, UV, and sun (very little by food) 112 items

FACT: Adding vitamin D to diets has been proven E1 E2 in clinical trials to both PREVENT some and TREAT some diseases
OBSERVATION: Adding vitamin D (intervention) does PREVENT and TREAT additional diseases - more trials are underway
OBSERVATION: There are at least 10 ways to increase the response by the blood to vitamin D intake

Details at VitaminDWiki

• All items: Deficiency of Vitamin D 462 items
• Incidence of 22 health problems related to vitamin D have doubled in a decade many charts
• Vitamin D levels have been crashing since 1995 (Polish Children, Elite Military, etc)
• People with gut problems are low on vitamin D – April 2011
• Concealing clothing resulted in only 8 ng vitamin D – Feb 2011
• 23 ng of vitamin D in sunny Israel – Dec 2010
• Need to avoid the sun during the summer in Dubai
• Vitamin D deficiency spares no body part – NE Asia – Jan 2013
  • Diseases associated with Winter and the North are occurring in the Summer now that they can avoid the extreme summer heat with air conditioning
• Vitamin D less than 22 ng in Greece half of the year– May 2011
• Vitamin D insufficiency in UK youths – 37X more likely if dark skin – July 2011
• All items in Far From Equator 124 items
• Beijing extremely vitamin D deficient even in the fall: 10 ng – April 2013
• 93 % of US children had less than 30 ng of vitamin D Oct 2021
• 92 % of ALL Germans less than 30 ng - Jan 2012
• 92 % of German elderly less than 30 ng - Jan 2012
• 91 % of Japanese women less than 30 ng - 2012
• 90 % of Canadian youth less than 30 ng vitamin D – Oct 2010
• 90 % of Swiss men have less than 30 ng of vitamin D in the winter – Nov 2012
• 90 % of young health care professionals had less than 30 ng of vitamin D – Nov 2011
• 87 % of Tennessee general medicine patients had less than 32 ng of vitamin D – Jan 2011
• 86 % of UK elderly less than 30 ng - Jan 2010
• 86 % of US military has less than 32 ng of Vitamin D – Dec 2020
• 82 % of Swedes did not have the recommended amount of vitamin D – Feb 2011
• 80 % of teens in Europe had less than 30 ng of vitamin D – Aug 2011
• 79 % of middle aged Americans had less than 32 ng of vitamin D – July 2010
• 76 % of Irish had less than 30 ng of vitamin D – April 2013
• 70 % of Koreans in their twenties had less than 20ng of vitamin D – Dec 2010
• 50 % of Quebec kids had less than 20 ng of vitamin D – Milk and movement did not help – Mar 2011
• 42 % of US adults less than 20 ng of vitamin D and 82 % of blacks – Jan 2011
• 33 % of pre-teens in Tehran had less than 5 ng of vitamin D – Feb 2011
• 30 % of US had less than 20 ng of vitamin D - CDC March 2011
• 27 % of Turkish mothers has less than 11 ng of vitamin D
• Vitamin D could save More than 10,000 Canadian lives annually LEF
• Teens increasingly indoors - especially if dark skin - July 2010
• Criteria to associate a disease with the lack of vitamin D
• Many reasons why vitamin D deficiency has become epidemic
• Ways to increase the amount of vitamin D you get from the sun
• Review of Vitamin D Deficiencies in developing countries - Oct 2011
• Military and Vitamin D - many studies
• Quick, free, self test of vitamin D deficiency

• Health problem frequency - 1997 = rates of occurrence of human health problems