Ginger is a periennial herb and the essential oil is extracted from it by steam distillation from the dried unpeeled ground root. Ginger is a pale yellow, amber or greenish liquid with a warm, fresh, woody-spicy scent. Ginger is very good for poor Circulation, a couple of drops in a massage oil and a nice deep massage can improve poor circulation areas. 2-3 drops in a bath can ease muscles aches and pains and a couple of drops in an oil burner when suffering from a cold and congestion will clear the head and make you feel human again.