CassiaA warming oil that dates back to biblical times, Cassia promotes healthy digestion and immune function while providing a strong, uplifting aroma. Description 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