Herbs and spices are rich in antioxidants, and they are also potent inhibitors of tissue damage and inflammation caused by high levels of blood sugar.

When researchers tested extracts from 24 common herbs and spices, they found a direct correlation between antioxidant phenol content and the ability of the extracts to block the formation of compounds that contribute to damage caused by diabetes and aging.

Spices such as cloves and cinnamon have phenol levels that are 30 percent and 18 percent of dry weight, respectively, while herbs such as oregano and sage are 8 and 6 percent phenol by dry weight. Blueberries, which are widely touted for their antioxidant capabilities, contain roughly 5 percent phenol by dry weight.