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Cinnamon

Also called Cassia cinnamon, Cinnamomum cassia

A traditionally used botanical whose glucose literature is genuinely mixed: one umbrella review is positive, a dose-response analysis of 15 trials is null.

Dose used in research 1-6 g per day in trials

We include cinnamon as a traditionally used botanical, and we are not going to overstate it. An umbrella meta-analysis found a fasting glucose reduction in type 2 diabetes and PCOS. A dose-response meta-analysis of 15 randomised trials found no significant overall effect.

When two credible syntheses disagree, the honest description is that the evidence is mixed, and that the better data sits in populations that are not ours.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

The research

Human studies on this ingredient, with the design, sample size and dose each one used. Research on an ingredient is not a claim about any finished product.

  1. meta-analysis2023

    The effect of cinnamon supplementation on glycemic control in patients with type 2 diabetes or with polycystic ovary syndrome: an umbrella meta-analysis on interventional meta-analyses

    Umbrella meta-analysis of interventional meta-analyses. Fasting glucose -10.93 mg/dL in type 2 diabetes or PCOS. Dose used: 1-6 g/day cinnamon.

  2. meta-analysis2023

    The Effect of Cinnamon on Glycolipid Metabolism: A Dose-Response Meta-Analysis of Randomized Controlled Trials

    Dose-response meta-analysis of 15 randomised trials. No significant overall effect on glycolipid measures. Read alongside the umbrella review: this literature is genuinely mixed. Dose used: 1-6 g/day cinnamon.

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