Results from a clinical study published in the Diabetes Care journal in 2003 suggest that cassia cinnamon (cinnamon bark) improves blood glucose and cholesterol levels in people with type 2 diabetes, and may reduce risk factors associated with diabetes and cardiovascular disease. A daily intake of just 1, 3, or 6 grams was shown to reduce serum glucose, triglyceride, LDL or bad cholesterol and total cholesterol after 40 days among 60 middle-aged diabetics. Another study reported in the July 2000 edition of Agricultural Research Magazine found that consuming just 1g of cinnamon per day can increase insulin sensitivity and help manage or reverse type 2 diabetes. In addition, more recent analysis published in 2007 in The American Journal of Clinical Nutrition showed that 6g of cinnamon slows stomach emptying and significantly reduces hyperglycemia after meals (postprandial blood glucose) without affecting satiety.
As a result of the scientific evidence available, many health experts claim that cinnamon contains properties that are beneficial for blood sugar regulation and treatment of type 2 diabetes. However, bear in mind that like many natural compounds cinnamon is yet to be medically approved for prevention or treatment of any disease.