Essential Oils in Cinnamon Species. Cinnamaldehyde is a constituent that has been studied in both plant species
Essential Oils in Cinnamon Species. Cinnamaldehyde is a constituent that has been studied in both plant species but is higher in the true cinnamon. A 2006 study implied that it may be the cinnamaldehyde that is responsible for the activity of Cinnamon. Also known as ""true cinnamon"" this species originates from Sri Lanka and contains considerably higher levels of key essential oils than are present in Chinese Cinnamon (AKA Cassia). This premium organic spice shares similar clinical properties as Cassia without the safety concerns because it is naturally much lower in coumarins.