Effect of cinnamon on glucose control and lipid parameters

Diabetes Care. 2008 Jan;31(1):41-3. doi: 10.2337/dc07-1711. Epub 2007 Oct 1.


Objective: To perform a meta-analysis of randomized controlled trials of cinnamon to better characterize its impact on glucose and plasma lipids.

Research design and methods: A systematic literature search through July 2007 was conducted to identify randomized placebo-controlled trials of cinnamon that reported data on A1C, fasting blood glucose (FBG), or lipid parameters. The mean change in each study end point from baseline was treated as a continuous variable, and the weighted mean difference was calculated as the difference between the mean value in the treatment and control groups. A random-effects model was used.

Results: Five prospective randomized controlled trials (n = 282) were identified. Upon meta-analysis, the use of cinnamon did not significantly alter A1C, FBG, or lipid parameters. Subgroup and sensitivity analyses did not significantly change the results.

Conclusions: Cinnamon does not appear to improve A1C, FBG, or lipid parameters in patients with type 1 or type 2 diabetes.

Publication types

  • Meta-Analysis

MeSH terms

  • Blood Glucose / metabolism
  • Cinnamomum zeylanicum*
  • Diabetes Mellitus, Type 1 / blood
  • Diabetes Mellitus, Type 1 / drug therapy
  • Diabetes Mellitus, Type 2 / blood
  • Diabetes Mellitus, Type 2 / drug therapy
  • Dietary Supplements*
  • Glycated Hemoglobin / metabolism*
  • Humans
  • Lipids / blood*
  • Randomized Controlled Trials as Topic
  • Reproducibility of Results


  • Blood Glucose
  • Glycated Hemoglobin A
  • Lipids