Effect of short-term administration of cinnamon on blood pressure in patients with prediabetes and type 2 diabetes

Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada. Electronic address: .
Nutrition (Impact Factor: 2.93). 07/2013; 29(10). DOI: 10.1016/j.nut.2013.03.007
Source: PubMed


The aim of this study was to systematically review and evaluate the effect of short-term administration of cinnamon on blood pressure regulation in patients with prediabetes and type 2 diabetes by performing a meta-analysis of randomized, placebo-controlled clinical trials.
Medical literature for randomized controlled trials (RCTs) of the effect of cinnamon on blood pressure was systematically searched; three original articles published between January 2000 and September 2012 were identified from the MEDLINE database and a hand search of the reference lists of the articles obtained through MEDLINE. The search terms included cinnamon or blood pressure or systolic blood pressure (SBP) or diastolic blood pressure (DBP) or diabetes. A random effects model was used to calculate weighted mean difference and 95% confidence intervals (CI).
The pooled estimate of the effect of cinnamon intake on SBP and DBP demonstrated that the use of cinnamon significantly decreased SBP and DBP by 5.39 mm Hg (95% CI, -6.89 to -3.89) and 2.6 mm Hg (95% CI, -4.53 to -0.66) respectively.
Consumption of cinnamon (short term) is associated with a notable reduction in SBP and DBP. Although cinnamon shows hopeful effects on BP-lowering potential, it would be premature to recommend cinnamon for BP control because of the limited number of studies available. Thus, undoubtedly a long-term, adequately powered RCT involving a larger number of patients is needed to appraise the clinical potential of cinnamon on BP control among patients with type 2 diabetes mellitus.

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Available from: Nicola Robinson
    • "Regarding cinnamon, a recently published meta-analysis of three randomized controlled trials indicated that consumption of cinnamon was associated with notable reductions in SBP and DBP in prediabetic and diabetic patients. The authors concluded that the possible reductions in SBP and DBP were strongly related to the patients' baseline BP levels.[11]Although we failed to find a significant effect of cardamom intake on BP, others have shown the beneficial effect of this herbal medicine on BP. "
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