100% pure tea tree oil Pharmaceutical grade Natural antiseptic properties Holland & Barrett Tea Tree Oil is 100% pure and all-natural. You'll find no nasty surprises in this tea tree oil; it's pure and pharmaceutical grade, so you know you're guaranteed premium quality oil, unlike other "tea tree oil" you might find elsewhere! Extracted from the Australian Tea Tree (Melaleuca alternifolia), Tea Tree Oil can be used topically for a variety of skin issues or added to bath water to ease congestion. It is recognised for its distinctive clean smelling, refreshing scent as well as its wide range of uses.