Mustard oil is extracted at a low pressure and at low temperature. It is one of the best cooking oil particularly for heart patients because it has an omega-3(MUFA) and 6 fatty acid composition in good proposition. Mustard oil has 30% proteins, calcium, phytins, phenolics, and natural anti-oxidants. Mustard oil contains high amount of mono-unsaturated fatty acids and a good ratio of polyunsaturated fatty acids which is good for heart. It contains the least amount of saturated fatty acids making it safe for heart patients. It may be said that it is the safest oil and is as good as any other edible oil. Mustard oil which is rich in alpha-linolenic acid, an essential fatty acid which has been shown to reduce cholesterol levels and reduce the risk of heart diseases.