Active ingredients in Powder: (1.10%) Peppermint Oil 0.55%, Virginia Cedar wood Oil 0.55% Inert Ingredients: Silica, Isopropyl Myristate, and Limestone Made with only naturally occurring flea and tick repellents: Virginia Cedar wood Oil ? Known to be repellent to fleas, ticks, and mosquitoes, but completely non-toxic to animals and people. It?s considered to have antiseptic, anti-fungal, and antibacterial properties and to be beneficial for the skin and coat. Peppermint Oil* - Medicinal, relieves stress, repels insects, and has a natural minty scent. *Any essential oil, in rare cases, may cause an allergic reaction. However, the oils we use in our Nature?s Protection? products are at such low levels that the risk of any potential reactions are further eliminated. For cat parents: Cats don?t possess the enzymes glucuronyl transferase and therefore their liver requires more time to eliminate phenolic compounds (which are found in some essential oils) and in medications such as aspirin or acetaminophen. Neither peppermint oil nor Virginia cedar wood oil contain these compounds. Contact your veterinarian for more information.