A close relation to Cinnamon, Cassia has a strong, spicy aroma that can be used in small quantities to transform any essential oil blend. Cassia has been used for thousands of years for its many health benefits. It’s one of the few essential oils mentioned in the Old Testament, noted for its unmistakable fragrance and calming aromatic properties. Cassia is a “warming” oil that helps promote a healthy immune function when ingested.* It also is a great oil to diffuse during cold months due to its warming properties and spicy scent.