NOW Foods Rosemary Oil 4 fl oz is a 100% pure steam-distilled essential oil from Rosmarinus officinalis in a generous economy size ideal for regular aromatherapy use, natural hair care formulations, and practitioners. Rich in 1,8-cineole and camphor, rosemary oil is both mentally stimulating and therapeutically versatile — supporting scalp circulation, focus and memory when diffused, and providing a fresh, herbaceous aroma that blends beautifully with citrus, lavender, and mint oils. GC/MS tested by NOW Foods to verify the correct chemical composition. At 4 fl oz this bottle provides exceptional value for frequent users who incorporate rosemary oil into daily routines. Dilute appropriately before topical application. Not for internal use.