Synthetic tendly oregano oil （ carvacrol ） oil of oregano has the properties of anti - bacterial ( gram - positive bacteria and gram negative bacteria ) , anti - coccidia and anti - oxidant activity 添德力牛至油（香芹酚）的生物活性几乎对所有重要的革兰氏阳性和革兰氏阴性菌都有活性，同时还有抗真菌、抗球虫和抗氧化特性。