Rosemary is an herb. Oil is extracted from the leaf and used to make medicine.
Rosemary is used for digestion problems, including heartburn, intestinal gas (flatulence), liver and gallbladder complaints, and loss of appetite. It is also used for gout, cough, headache, high blood pressure, and reducing age-related memory loss.
Some women use rosemary for increasing menstrual flow and causing abortions.
Rosemary is used topically (applied to the skin) for preventing and treating baldness; and treating circulation problems, toothache, a skin condition called eczema, and joint or muscle pain such as myalgia, sciatica, and intercostal neuralgia. It is also used for wound healing, in bath therapy (balneotherapy), and as an insect repellent.
In foods, rosemary is used as a spice. The leaf and oil are used in foods, and the oil is used in beverages.
In manufacturing, rosemary oil is used as a fragrant component in soaps and perfumes.