(Cinnamomum cassia)

Cinnamon (Cinnamomum cassia, C. verum, C. loureiroi, C. burmannii) is added to a variety of products, ranging from foods (e.g., breakfast cereals, baked goods) to fragrances and essential oils. Cinnamon was ranked within the 25 top-selling herbal supplements in 2019 due to popularity and prevalent use. As a supplement, cinnamon is promoted for diabetes, gastrointestinal disorders, and other conditions. Collectively, cinnamon has the potential to precipitate interactions with pharmaceutical medications.