Cinnamon bark (Cinnamomum cassia) is a valuable natural ingredient obtained from cinnamon trees of the Lauraceae family, distributed in China, India, Vietnam, Indonesia, and other countries. Its main component is cinnamaldehyde, along with more than 160 other chemical compounds. Cinnamon bark not only provides its characteristic warm, spicy aroma but also offers a wide range of health benefits. Studies have shown that cinnamon bark has anti-inflammatory and pain-relieving properties, supports blood sugar regulation, strengthens immunity, protects cardiovascular health, and may even help inhibit tumor growth. In particular, cinnamaldehyde is considered an important indicator of the medicinal quality of cinnamon bark and is widely used in traditional medicine to treat chronic conditions and support overall health. Thanks to these diverse pharmacological effects, cinnamon bark is both a common spice and a highly valuable medicinal ingredient.