Introduction Antioxidants are commonly added to fats, oils, and foods a containing substantial amount of fat to inhibit the develop- tre ment of off-flavors arising from the oxidation of unsaturated th fatty acids (Sharif and others 2009; Che Man and Tan 1999). (C The most widely used synthetic antioxidants in foods are butyl- th hydroxytoluene (BHT). butyl-hydroxyanisol (BHA), and tertiari butyl-hydroquinone (TBHQ) (Politeo and others 2007). Although re synthetic antioxidants are very effective during storage and trans- vi port of oils and fats, they are less effective at frying temperatures, id which normally are between 130 and 180 °C. In addition, there w are some serious problems concerning its safety and toxicity (Sharif an and others 2009), being a health hazard, causing biological damage i to living tissues and increasing risk of cardiovascular diseases (Addis and Park 1989; Chow 1992). Therefore, a consumer-friendly way t for improving the stability of frying oils and fats is the addition of natural antioxidants (Sharif and others 2009), such as pheno- i lic compounds from fruits, vegetables, nuts, seeds, leaves, roots, and barks (Gulcin and others 2007). Selected natural extracts and compounds have been evaluated as antioxidants during operations of repeated deep-fat frying. Lalas and Dourtoglu (2003) reported rosemary extract as a powerful antioxidant during frying of potato chips. Jaswir and others (2000) successfully tested sage extract and citric acid as antioxidants during frying of potato chips. and others (2007) reported that the addition of tocopherol and tocotrienols resulted in higher stability of refined vegetable oils during frying of French Fries