While researching and collecting information about essential oils, you might have come across a certain thing called thieves oil. But what are thieves' oil or, so to say, thieves of marseilles remedy ? If you dig deep further into this oil you will see it's a blend of different essential oils, mostly Cinnamon, Clove, Lemon, Eucalyptus and Rosemary. But what's the benefit of using theives oil? Well, there are many, including boosting the immune system and fighting infections. Therefore, many of the researchers have worked hard and found the real results of the properties of the wild creek naturals - and they relate to the health and wellness of every human being. Thieves oil or thieves oil cold sore is mainly a mixture of five oils- lemon, Rosemary, clove, eucalyptus and cinnamon.