Cinnamon comes from the inner bark of *Cinnamomum* trees. Cassia and Ceylon are the two main types you will find. This spice supports healthy blood sugar metabolism when taken before meals or alongside carbohydrates.*
Some products, such as Cinnulin PF, offer a water-soluble extract standardized for type A polymers. People usually take it as a powder or in capsules. Timing it with carb-containing meals is the standard approach.
Cassia cinnamon contains coumarin. Sensitive individuals who use Cassia varieties for a long time may experience issues with liver function. Cypriot cinnamon has much lower coumarin levels.