n-Hexane extract antioxidant properties from broccoli, sesame leaves, tomatos, black beans, coriander, and peels of apples, red grapes, carrots, and sweet potatos were determined in corn oil heated at 60 and $140^{circ}C$. Broccoli, sesame leaves, and coriander showed high antioxidant properties. Carrots at $60^{circ}C$ showed pro-xidative activities at both 1 and 5 mg concentrations. Red grape peels act as pro-oxidants at 1 mg, and as antioxidants at 5 mg. At $60^{circ}C$, the antioxidant properties of hexane extracts were obvious, but not at $140^{circ}C$. Broccoli and sesame leaves showed high anti-oxidative activities. Apple and sweet potato peels accelerated lipid oxidation rates.