Cinnamon is a highly delicious spice. It’s high in cinnamaldehyde, which is thought to be responsible for most of cinnamon’s health benefits. Cinnamon has been shown to significantly increase sensitivity to the hormone insulin. Cinnamaldehyde has antifungal and antibacterial properties, which may reduce infections and help fight tooth decay and bad breath. It can lower blood sugar levels, reduce heart disease risk factors and has a plethora of other impressive health benefits.