Individuals looking to lower blood sugar levels should ingest one to six grams of cassia cinnamon daily for at least 40 days, reports WebMD. Caution should be exercised when using a cinnamon supplement with other diabetes or liver-affecting medications and supplements.
While there has been some evidence pointing to cinnamon's worth in lowering blood sugar levels, the American Diabetic Association discounts cinnamon as a treatment for diabetes, according to WebMD. The most promising study on cinnamon found that it can cause a 24 percent reduction in blood glucose levels and an 18 percent reduction of cholesterol in the blood as well. Individuals in this study ingested one to six grams of cassia cinnamon daily over the 40 day study. Scientists believe cinnamon has a positive effect on blood sugar levels because it improves insulin sensitivity. The body moves more sugar from the bloodstream into the body's cells due to this increased sensitivity, and thus reduces blood sugar.
Despite these benefits, medical professionals urge caution when beginning a cinnamon supplementation regimen, reports WebMD. Those already using diabetes medication or supplements for blood sugar should check with their medical professional before using cinnamon, as hypoglycemia can result. In addition, large amounts of cinnamon can have effects on the liver. Those taking liver medication or have pre-existing liver conditions should consider other supplementation options.