At the very least, natural food quality toasted sesame oil must not be refined. Bleaching, deodorizing, and high temperature or chemical extraction of oils removes important natural ingredients, de-natures the natural colors and flavors, and often leaves behind toxic residues. Natural toasted sesame oil such as Mitoku's Hiraide and Takemoto oils are not only unrefined, but they also use simple, purely mechanical means to extract the oil from sesame seeds. This traditional technique not only results in a much healthier and more flavorful oil, but it also saves the environment from the toxic effects of disposing of strong organic solvents such as hexane.