NOW Foods Clove Oil is a 100% pure essential oil steam-distilled from the flower buds of Syzygium aromaticum — one of the most potent antimicrobial essential oils available, containing 70-90% eugenol, a phenolic compound with powerful antibacterial, antifungal, antiviral, and antioxidant properties. Clove oil has been used for centuries in traditional dentistry for temporary relief of toothache and oral pain, owing to eugenol's local anesthetic effect. In aromatherapy it is warming, stimulating, and supportive of immune function. NOW Foods' Clove Oil is GC/MS tested to verify eugenol content and purity — ensuring you receive authentic, therapeutically active clove essential oil. For aromatic or topical use; clove oil is highly potent and must be significantly diluted in carrier oil (1-2%) before skin application. Not for internal use.