I have been using patanjali aarogya kachi ghani pure mustard oil for the last 6 months and can say that is the best of all. nowadays, mustard oil is mixed with argemone oil an extract from argemone seeds simply to increase their quality. consumption of this oil is detrimental to health, especially among children. in adults it raises the level of bad cholestrol, extremely harmful for the heart. however, this perticular brand can be considered healthy as it us devoid of trans-fat, is low in saturated fats and has a high content of mono- unsaturated fats and polyunsaturated fatty acids such as omega 3. the price is totally acceptable, 1 ltr costs around 135/- rupees. if purity is what is requires the this us the one that is a must buy