Eucalyptus oil is extracted by steam distillation of the fresh leaves. There are many varieties of eucalyptus oil in the market, most of which have common uses. The leaves contain a high proportion of oil making it inexpensive. It has a variety of uses in the treatment of colds and flu and muscular aches and pains (see our Sports Massage Oil). Eucalyptus also has an insect repellent effect (try rubbing a few crushed leaves on your skin when there is no repellant on hand!). Blends well with lavender, lemon, peppermint, basil and lemongrass.