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A Cross-sectional Study on the Effect of Dietary Zinc Intake on the Relationship Between Serum Vitamin D and HOMA-IR

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Journal Front Nutr
Date 2022 Nov 10
PMID 36352900
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Abstract

Introduction: Serum vitamin D concentration is associated with the risk of insulin resistance. Zinc has also been reported to be associated with a lower risk of insulin resistance. In addition, zinc is an essential cofactor in the activation of vitamin D. However, the effect of dietary zinc intake on the relationship between vitamin D and insulin resistance risk has not been fully studied. Therefore, we designed this cross-sectional study to assess the impact of changes in zinc intake on the relationship between vitamin D and insulin resistance risk.

Study Design And Methods: This study analyzed data from the national Health and Nutrition Examination Survey (NHANES) from 2005 to 2018, involving 9,545 participants. Participants were stratified by zinc intake category (low zinc intake <9.58 mg/ day; High zinc intake: ≥9.58 mg/ day).

Results: In this cross-sectional study, serum vitamin D levels were independently associated with the risk of insulin resistance in both the low and high Zinc intakes (β: -0.26, 95%Cl: -0.56~0.04 vs. β: -0.56, 95%Cl: -1.01~-0.11). In addition, this association was influenced by different dietary zinc intakes (interaction < 0.05).

Conclusions: Our results suggest that zinc intake may influence the association between serum vitamin D and the risk of insulin resistance. Further randomized controlled trials are needed to provide more evidence of this finding.

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