77% of Asians have less than 30 ng of Vitamin D – meta-analysis June 2023

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High prevalence of vitamin D deficiency in Asia: A systematic review and meta-analysis

Crit Rev Food Sci Nutr. 2023;63(19):3602-3611. doi: 10.1080/10408398.2021.1990850 PDF behind paywall
Zhiwei Jiang 1, Rui Pu 1, Na Li 1, Chaozhen Chen 1, Jialu Li 1, Wei Dai 1, Yuchen Wang 1, Jinxing Hu 1, Danji Zhu 1, Qiong Yu 1, Yuan Shi 1, Guoli Yang 1

Vitamin D deficiency is a worldwide health problem. However, the prevalence of vitamin D deficiency in Asian populations is unclear. The aims of our study were to investigate the prevalence of vitamin D deficiency and its association with different health outcomes in Asia. Searches for studies published from January 2009 to January 2021 were performed in the MEDLINE (via PubMed), EMBASE, and Web of Science databases. This study was registered in the PROSPERO database (CRD42021229841).
In total, 472 studies with 746,564 subjects were included in the meta-analysis. The mean serum 25-hydroxyvitamin D (25[OH]D) concentration was 49.39 nmol/L; 20.93% of the participants had 25(OH)D levels <25 nmol/L, 22.82% had levels <30 nmol/L, 57.69% had levels <50 nmol/L, and 76.85% had levels <75 nmol/L. This review found that the prevalence of vitamin D deficiency in Asia is high.
The factors significantly related to vitamin D deficiency were gender, age, altitude, region, and specific diseases (diabetes, cancer, fracture, systemic lupus erythematosus [SLE], fatty liver disease, osteopenia, thyroiditis, anemia, hepatitis, metabolic diseases, and dermatitis). These findings may serve as the foundation for more detailed public health strategies and policies on this issue. Supplemental data for this article is available online at https://doi.org/10.1080/10408398.2021.1990850.

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VitaminDWiki - 24 studies in both categories Deficiency and Orient

This list is automatically updated

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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