Yields from steam distillation of the flowers and leaves are less than one half percent. The odor is herbal, camphor-like, spicy, warm and sweet. Natural constituents include Pinene, camphene, hyssopin, terpenes, and sesquiterpenes, nerolidol, spathulenol, linalool, geraniol, and borneol. Hyssop blends with citrus, lavender, rosemary, myrtle, laurel leaf, sage, clary sage, and cedar leaf. Among aromatherapy professionals it is thought to be useful treating bruises, lack of energy, and allergies.