Cinnamomum cassia leaf oil , commonly known as Chinese cinnamon oil, is a valuable ingredient in the cosmetics industry, especially in hair care products. This oil is extracted from the leaves of the cinnamon tree, through a steam distillation process. Rich in components such as cinnamaldehyde, eugenol and linalool, this oil has antioxidant and antimicrobial properties. Its warm and spicy aroma makes it ideal for aromatherapy products, in addition to providing a unique sensory experience. Throughout history, Cinnamomum cassia leaf oil has been used for its medicinal properties, helping to treat infections and improve blood circulation. This oil is an essential component in hair treatments due to its ability to deeply nourish and revitalize, making it an essential ally in Doncabello hair care products.