Did you know? Essential oils are always applied externally; they are never, never swallowed! Taking them internally may be fatal. They are applied to the skin and use as an aroma, to help certain physical conditions. Purchase small bottles, since the oxygen in the bottle gradually deteriorates the oil. Make sure the label says “pure essential oils.” Some oils cannot be extracted (such as peach oil or apple blossom oil); products so advertised are not genuine.