Consumption of cinnamon is associated with a statistically significant decrease in levels of fasting plasma glucose, total cholesterol, low-density lipoprotein cholesterol and triglyceride, and an increase in high-density lipoprotein cholesterol.
A meta-analysis of 10 randomized controlled trials evaluating the effects of cinnamon use in 543 patients with type 2 diabetes at doses of 120 mg/d to 6 g/d for four to 18 weeks found reduced levels of fasting plasma glucose (-24.6 mg/dL; 95 percent CI, -40.5 to -8.7), total cholesterol (-15.6 mg/dL, -29.8 to -1.4), LDL-C (-9.4 mg/dL; 95 percent CI, -17.2 to -1.6) and triglycerides (-29.6 mg/dL; 95 percent CI, -48.3 to -10.9). Cinnamon also increased levels of HDL-C (1.7mg/dL; 95 percent CI, 1.1 to 2.2). No significant effect on hemoglobin A1c levels was seen. High degrees of heterogeneity were present for all analyses except HDL-C.
Despite the generally positive results, the authors advise caution in applying the results of this analysis to patient care because of the uncertainty of the dose and duration of cinnamon use and uncertainty of the ideal patient population.
Cinnamon Use in Type 2 Diabetes: An Updated Systematic Review and Meta-Analysis
By Olivia J. Phung, PharmD, et al
Western University of Health Sciences, Pomona, Calif.
September/October 2013 Annals of Family Medicine