NOW Foods Tea Tree Oil is a 100% pure essential oil steam-distilled from the leaves of Melaleuca alternifolia — native to Australia and one of the most extensively researched essential oils in the world. Tea tree oil's principal active compound, terpinen-4-ol, has demonstrated potent antimicrobial, antifungal, and anti-inflammatory properties in published research, supporting its traditional and modern uses for skin blemishes, minor cuts and scrapes, nail fungus, and scalp conditions. NOW Foods' Tea Tree Oil is GC/MS tested (gas chromatography/mass spectrometry) to verify identity, purity, and the specific terpene profile that determines therapeutic quality — ensuring you receive genuine Melaleuca alternifolia at the correct composition. For topical or aromatic use; always dilute in a carrier oil before skin application. Never ingest.