Herbs have been used for countries for their utility in food preservation, through both antimicrobial and antioxidant mechanism. Fats and oil are commonly consumed as ingredients in a wide variety of foods, ranging from baked goods to salad dressing to frying oil. However, oxidation of lipid-based food ingredients results in off - flavors and ultimately, a decline in product quality (Selani and other 2011).
For this reason, antioxidant are added to food to suppress lipid oxidation (Shahidi and Zhong 2011).
There compounds are often synthetic, such as butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT), and tertiary-butyl hydroquinone (TBHQ).