Cinnamon

Cinnamon is that comfy, warm spice that makes everything so much better! It can be used in sweet and savory dishes. Cinnamon is the dried bark of the Cinnamomum tree and is found primarily in Sri Lanka. Many parts of the tree have long been used in traditional medicine and cuisine. There are different kinds of cinnamon which were used for different remedies. Today, cinnamon products are often promoted as being helpful in treating things like diabetes and allergies. Cinnamon as a medicine is not clearly supported by research, however. You should always talk to your doctor before deciding to use over the counter natural remedies, including cinnamon. 

https://www.nccih.nih.gov/health/cinnamon