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SYSTEMATIC REVIEW
Year : 2017  |  Volume : 21  |  Issue : 5  |  Page : 765-775

Systematic review on vitamin D level in apparently healthy Indian population and analysis of its associated factors


1 Department of Clinical Pharmacology, JIPMER, Puducherry, India
2 Department of Pharmacology, Karuna Medical College, Palakkad, Kerala, India
3 Department of Endocrinology, JIPMER, Puducherry, India

Correspondence Address:
Sandhiya Selvarajan
Department of Clinical Pharmacology, JIPMER, Puducherry
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijem.IJEM_168_17

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Background: Vitamin D which is involved in the maintenance of bone mineral homeostasis has been found to portray various pleiotropic effects. Although it has been widely accepted that serum 25-hydroxy Vitamin D level above 30 ng/ml is considered optimal for the biological actions of Vitamin D, there is a need to explore the levels of Vitamin D reported among Indians from various regions of the country. Hence, this systematic review aims to appraise the status of Vitamin D levels reported from apparently healthy Indians across various parts of India. Methodology: A comprehensive literature search was carried out to identify the range of Vitamin D levels among apparently healthy individuals from various parts of India, with the search term “Vitamin D and India” in the search portals of PubMed, Google Scholar, Indmed, and ScienceDirect. A total of 2998 articles were retrieved by the above search strategy, of which only forty studies fulfilled the criteria to be included in the systematic review. Studies done in various states were compiled under the respective zones based on the classification of Indian zones as specified in Zonal maps of India. Results: The level of Vitamin D from all the forty included studies ranged from 3.15 ± 1.4 to 52.9 ± 33.7 ng/ml. The effect size of Vitamin D level was higher in the South Zone compared to other zones. Conclusion: The present study shows that Vitamin D deficiency is prevalent among apparently healthy Indians living in different regions of India, irrespective of their exposure to sunlight.


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