Cinnamon contains several unique substances such as cinnamaldehyde and ethylcinamate which have several different blood pressure lowering actions. Cinnamon extracts improve blood vessel elasticity and promote blood vessel dilation through mechanisms involving nitric oxide, activation of potassium channels in smooth muscle, and by improving the flow of calcium in and out of cells. Cinnamon also lowers blood pressure through a mild diuretic effect that reduces the amount of sodium and fluid in the circulation.