True Cinnamon, (Cinnamomum verum) is made from the bark of an evergreen tree found in Sri Lanka, it is potent source of antioxidants.

One does have to be somewhat careful in obtaining cinnamon, however, as several other related species of ground bark are also often marketed as cinnamon as well. Cassia (Cinnamomum aromaticum) in particular, is sold as Cinnamon in most supermarkets in the United States. A couple of other varieties are Malabathrum (Cinnamomum tamala) and Saigon Cinnamon (Cinnamomum loureiroi).

According to one study, Cassia (Cinnamomum aromaticum) provides a number of benefits for those with Type 2 Diabetes. The effects found were as follows: