Thieves® was created based on research about four thieves in France who covered themselves with cloves, rosemary, and other aromatics while robbing plague victims. This proprietary essential oil blend was university tested for its cleansing abilities. It is highly effective in supporting the immune system and good health.* Thieves® oil blend is an integral ingredient in Thieves® Household Cleaner, Thieves® Spray, Thieves® Wipes, Thieves® Lozenges, Thieves® Dentarome Plus™ and Thieves® Dentarome Ultra™ toothpastes, and Thieves® Fresh Essence Plus™ Mouthwash. * This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.