Effects of cinnamon on controlling metabolic parameters of polycystic ovary syndrome: A systematic review and meta-analysis
Abstract
Ethnopharmacological relevance Cinnamon as a traditional medicine has been widely used in various disorders such as headache, toothache, common cold, diarrhea, flatulence, fever, amenorrhea frigidity. However, the effect of cinnamon supplementation on metabolic parameters of polycystic ovary syndrome (PCOS) patients has not been fully assessed. Aim of the study Clinical trials have shown contradictory effects of cinnamon supplementation on metabolic parameters of polycystic PCOS patients. Therefore, we evaluated the effect of cinnamon supplementation on metabolic parameters of PCOS patients through a systematic review and meta-analysis of clinical trials. Materials and methods PubMed, Embase, the Cochrane library, Scopus and Web of Science databases (until August 2019) were searched to identify potential clinical trials with information on cinnamon supplementation on metabolic parameters among PCOS patients. Weighted Mean Differences was pooled using a random-effects model. Standard methods were used for assessment of heterogeneity, publication bias and sensitivity analysis. Results Pooling five clinical trials (five treatment arms) together did not show any significant effect on body weight (WMD: -0.74 kg, 95% CI: -3.17 to 1.69) and body mass index (BMI) (WMD: -1.47, 95% CI: -4.07 to 1.12). Our results illustrated that a significant decrease of fasting blood sugar (WMD: -5.32, mg/dL95% CI: -10.46 to -0.17), fasting insulin (WMD: -4.10, μIU/dL95% CI: -6.76 to -0.144) and HOMA-IR (WMD: -0.69 95% CI: -1.37 to -0.004) were observed after cinnamon treatment. Moreover, our findings demonstrated that oral cinnamon supplementation in PCOS patients led to significant reduction of serum level of LDL-C, total cholesterol, and triacylglycerol. Besides, an improvement of serum concentration of HDL-C was shown by cinnamon supplementation. Conclusion Generally, present study indicated that cinnamon supplementation may help PCOS patients to manage their metabolic parameters. Future prospective randomized clinical trials with longer intervention duration are warranted to obtain a precise conclusion.
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The meta-analysis by Heydarpour et al. of five high-quality trials (448 women with PCOS) showed that cinnamon supplementation decreased fasting blood sugar, fasting insulin, and HOMA-IR.
“The meta-analysis of Heydarpour et al., which reviewed five high-quality trials involving 448 women with PCOS, showed that cinnamon supplementation decreased fasting blood sugar, fasting insulin, and HOMA-IR [200].”
The same meta-analysis noted lipid profile changes but no major effects on body weight or BMI.
“The researchers also noted lipid profile changes, yet no major effects were seen in body weight or BMI.”
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- Authors
- Heydarpour, F., Hemati, N., Hadi, A., Moradi, S., Mohammadi, E., & Farzaei, M. H.
- Affiliations
- Kermanshah University of Medical Sciences (IR)
- Corresponding author
- Farzaei, Mohammad Hosein
- Venue
- Journal of Ethnopharmacology
- Publisher
- Elsevier BV
- Published
- 2020-05
- Volume
- 254
- Pages
- 112741
- ISSN
- 0378-8741 (ISSN-L)
- OpenAlex
- W3009732557
- Cited by
- 47
- References
- 39
- Citations by year
- 2026: 5 · 2025: 6 · 2024: 10 · 2023: 7 · 2022: 6 · 2021: 13
- FWCI
- 0.96
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Ethnopharmacology (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Reproductive Medicine › Ovarian function and disorders
- Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Natural Antidiabetic Agents Studies
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Medicinal Plant Research
- Keywords
- cinnamon, polycystic ovary syndrome, cinnamon supplementation, metabolic parameters, fasting blood glucose, fasting insulin, insulin resistance, HOMA-IR, body weight, body mass index, lipid profile, LDL cholesterol, HDL cholesterol, triglycerides, traditional medicine
- MeSH terms
- Blood Glucose, Cinnamomum zeylanicum, Female, Humans, Insulin, Polycystic Ovary Syndrome, Randomized Controlled Trials as Topic, Dietary Supplements, Lipid Metabolism
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