A better question would be “What can’t it be used for”. Thieves has an amazing amount of uses. It is a great simulator to the immune system because it is anti-viral and anti-bacterial. You can mix it with a carrier oil and apply it to your thymus gland and the bottom of your feet to prevent colds and flu. You can combine it with some distilled water in a spray bottle and use it as a hand and mouth sanitizer. Applied directly to a cold sore it can help heal it quickly. Used to brush your teeth you can treat and prevent cavities. You can apply it to planter warts. Mix it with some soapy water in a spray bottle and use it as your household cleaner. It will clean and kill germs without harmful side effects. Those are just to name a few. To get more detailed information you can refer to an essential oil reference book.