It matters which type of cinnamon you use to help control your diabetes. Some types are more expensive than others. And some types might taste better than others to you, although my taste buds aren’t sensitive enough to tell much difference. But all types of cinnamon can reduce blood glucose levels.

The wave of interest in cinnamon as herbal medicine started half a dozen years ago when U.S. Agriculture Research Service scientists found that its most active compound – methylhydroxy chalcone...