Mustard oil is extracted at a low pressure and at low temperature. It contains 0.30-0.35% essential oil which act as preservative. The kachchi ghani oil is nutritious oil used by common man. 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, close to 10:1 rarely found in any other oil. The ideal ratio of omega 6 and 3 is 10:1. 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. Glucosinolate, the pungent principle in mustard oil, has anti bacterial, antifungal and anti carcinogenic properties, which accounts for many medicinal utilities of the oil. There relatively high level of oleic acid and the favorable balance between linoleic acid and linolenic acid is present in mustard oil. 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, was linked with 2 fold lower risk compared to sunflower oil. People who use mustard oil for frying reduce their risk of heart attack by almost 71%. The efficacy of mustard oil in protecting against heart attacks was attributed to its abundance of omega-3 polyunsaturated fatty acids.