The botanical properties of thyme extract (Thymus sp.) have been listed as anti-septic, tonic, anti-bacterial, deodorizing, fungicidal, and circulation stimulating. Certain fractions may have collagenase inhibitor abilities. Thyme extract might also have insect-repellent properties. Its active principle is thymic acid, which has disinfectant properties similar to those of carbolic acid. Thyme extract may cause skin irritation.