Are there any side effects to taking cinnamon every day?

Some people who consume cinnamon daily and are sensitive to it may be at a higher risk for liver damage, states MNT. Cassia cinnamon, which is a cheaper form of cinnamon, contains coumarin, which has been linked to liver damage.

According to WebMD the benefits of cinnamon have not been proven, but proponents claim the spice can help improve glucose and lipid levels in diabetics, prevent fungal infections, reduce inflammation and help prevent Alzheimer's disease. Heavy use of cinnamon may cause sores in and around the mouth and irritate the lips and gums. Lack of evidence concerning cinnamon intake as a treatment make it unsuitable for children and women who are pregnant or breastfeeding.