Our results agree with results of Subramanian et al. (2000) and Lin, Akoh, and Reynolds (1999, 2001): oil after frying chicken was much darker than oil that was heated alone. The addition of food ingredients, which leads to an accelerated decrease in oil during frying, may cause the observed darkening. The products of Maillard reactions between ingredients and food nutrients, such as sugars and amino acids, also darken the oil colour (Lin, Akoh, & Reynolds, 2001). Chicken frying oil had a much lower ‘b’ value than heated oil. It was difficult to determine a specific colour point corresponding to the TPM value of 24%.