Pressed Purity Walnut Oil is cold pressed from Australian grown walnuts and has a rich nutty taste. Walnuts contain a very high amount of Omega 3 which is beneficial for brain function and the repairing of cells. Walnut oil is also rich in manganese, copper, and melatonin - beneficial for a restful nights sleep. Walnut Oil is not suitable for cooking. Once opened, this oil must be refrigerated to prevent from becoming rancid.