16 oz,33 oz Mustard is quite commonly used as a condiment for fast foods as well as an ingredient in a variety of cuisines throughout the world. In the subcontinent, mustard oil is commonly used to prepare a number of dishes but the use of mustard oil as a cooking oil is regulated in both the EU and the US. This is due to the presence of an omega 9 fatty acid (erucic acid) whose effects on rat has been noted as causing buildup of cardiac lipid thus posing a health risk. However further research found that rats faced the same problem with other vegetable fatty acids.