Chinese cinnamon for improving glycemic control and blood lipids in adults with type 2 diabetes Original paper

Cassia (Chinese cinnamon) bark powder supplementation had no effect on markers of glycemic control or blood lipids in adults with type 2 diabetes.

This Study Summary was published on October 3 2021.

You are reading an Examine Study Summary.

Every month, we analyze and summarize 150+ new studies. Try Examine+ free for 7 days and unlock every summary and more.


Cinnamon, a spice obtained from the inner bark of tree species from the Cinnamomum genus, has potential antidiabetic and lipid-lowering properties. However, clinical trials exploring these potential effects in people with type 2 diabetes (T2D) have reported conflicting results.

The study

This meta-analysis of 8 clinical trials (7 randomized and 1 nonrandomized) examined the effects of supplementation with Cassia (Chinese cinnamon) bark powder on markers of glycemic control or blood lipids in 510 adults with T2D.

The markers examined were fasting blood glucose (7 trials), glycosylated hemoglobin (7 trials), triglycerides (6 trials), total cholesterol (6 trials), LDL cholesterol (6 trials), and HDL cholesterol (4 trials). The dosages of Cassia bark ranged between 1 and 2 grams per day, and the treatment durations ranged between 40 and 90 days.

The results

Cassia bark supplementation did not affect any of the outcomes examined.

There was considerable heterogeneity in the analyses of fasting blood glucose, triglycerides, and total cholesterol. Of the 8 trials, 4 had a low risk of bias, and 4 had a high risk of bias.

Every month we summarize over 150 of the most noteworthy health and nutrition studies. Other health categories related to this summary include:Try Examine+ for free to view the latest research in 25 health categories and the entire Study Summaries archive, access our Supplement Guides, and unlock the Examine Database. Plus, earn continuing education credits!

Get free weekly updates on what’s new at Examine.

This Study Summary was published on October 3 2021.