Studies indicate that cinnamon may aid the body in regulating blood sugar. The results have varied, however, and as of 2015 Mayo Clinic cautions against relying on cinnamon without further research.
On average, ingesting cinnamon as part of a controlled study has lowered glucose levels in individuals with Type 2 diabetes between 3 and 5 percent. Although this reduction is not enough to replace the medical treatment of diabetes, it is significant enough to positively impact the overall condition of patients when used in tandem with more traditional treatments. The improvement is found in fasting glucose levels. This suggests that those who are at risk of diabetes can also benefit from consuming cinnamon since spikes in fasting glucose levels are typical of pre-diabetes.
In addition to aiding in diabetes, research also indicates that cinnamon helps lower unhealthy cholesterol levels and triglycerides. Researchers warn, though, that eating the wrong type of cinnamon can also cause health problems n some people. In particular, Cassia cinnamon, the most common type sold in the United States, can cause liver damage if too much is consumed. There is no recommended daily amount in the United States, but the European Food Safety Authority recommends no more than 1 teaspoon per day. Cinnamon is derived from tree bark and has been renowned for centuries for its medicinal qualities.