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Effect of cassia cinnamon intake on improvement of the glycemic response: An updated meta-analysis - Focus on preparation of dehydrated powder and water extract
- Effect of cassia cinnamon intake on improvement of the glycemic response: An updated meta-analysis - Focus on preparation of dehydrated powder and water extract
- Kwak J.S.; Park M.Y.; Kwon O.
- Ewha Authors
- SCOPUS Author ID
- Issue Date
- Journal Title
- Journal of Nutrition and Health
- vol. 50, no. 5, pp. 437 - 446
- Cinnamomum aromaticum; Cinnamomum cassia; Cinnamon; Glycemic response; Meta-analysis
- Korean Nutrition Society
- SCOPUS; KCI
- Purpose: This meta-analysis aimed to evaluate the effect of cassia cinnamon (Cinnamomum. cassia and C. aromaticum) on the glycemic response with a focus on the preparation of dehydrated powder and water extract. Methods: We searched Pubmed, Cochrane, EMBASE, Science Direct, and the Korean Studies Information Service System (KISS) through May 2017. In the meta-analysis for the preparation of powder, eight trials reporting fasting blood glucose (FBG), four trials reporting HbA1c, and three trials reporting the postprandial glycemic response were included. For the water extract, six trials reporting FBG and four trials reporting HbA1c were eligible for this study. A random-effects model was used to calculate the pooled effect size. Results: Cassia cinnamon powder intake significantly lowered FBG by -1.55 mmol/L (95% CI, -2.45, - 0.64; p = 0.001) and the AUC of postprandial blood glucose level by -51.8 mmol/L·min (95% CI, -85.5, -18.1; p = 0.003). There was a significant difference in FBG between water extract of cinnamon and placebo of -0.76 mmol/L (95% CI, -1.09, -0.43; p = 0.000). However, blood HbA1c level was not significantly altered by any preparation of cinnamon. No statistical heterogeneity was observed for any analysis except in the case of FBG for cinnamon powder. Results of funnel plots and Egger's regression suggest a low likelihood of publication bias in all biomarkers (p > 0.05). Conclusion: According to this meta-analysis, there was possible evidence to support a relationship between cassia cinnamon intake and fasting glucose in both preparation of powder and water extract. Furthermore, new evidence of the health benefits on postprandial glucose regulation of cinnamon powder was obtained. © 2017 The Korean Nutrition Society.
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