One of the lesser known herbs that lower blood sugar, Marjoram, is high in polyphenols, which aids in stabilizing blood glucose levels. A 2012 study in the Journal of Evidence Based Alternative and Complementary Medicine found that Marjoram reduced formation of Advanced Glycation End (AGE) products. AGE is the smoking gun that researchers today say is responsible for a lot of the complications that diabetics face, like damage to arteries and eyes. Try sprinkling marjoram on your dinner every night to help add variety in flavor. It can often be used as a substitute for oregano in cooking and brings in a distinct flavor to dishes.
Another well know spice in the kitchen cinnamon is also known for it's medicinal properties. While not really an herb I still think it's important to list it in our list of herbs and their uses. Cinnamon actually comes from the inner bark of a tree in the laurel family. It's been used for centuries and was a hot commodity for trade in ancient times. In fact during the first century A.D. in Rome cinnamon was 15 times more expensive than silver. The Chinese were probably the first to use cinnamon as a medicinal herb and used it to treat fevers, and diarrhea. In more modern times cinnamon has been found to stabilize blood sugar levels in diabetics, as it has an insulin kind of effect.