The oil of rosemary, a flowering herb used primarily for its slightly bitter flavor and pleasant scent.

Rosemary oil extract is sometimes added to lubricants and cosmetics; the plant has a number of antioxidants, and it may also have anti-inflammatory properties. It is thought to be an aphrodisiac for men, and the oil can cause a pleasant cooling effect when it contacts the skin.

While rosemary is a safe substance, pregnant women should avoid products with large amounts of rosemary oil extract. Some people experience allergic reactions, but side effects are uncommon.