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

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.

VitaminDWiki - 24 studies in both categories Deficiency and Orient

This list is automatically updated

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

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from DSM

DSM 2014