Mustard seed powder is a popular condiment made from the seeds of the mustard plant. <br> A popular condiment for various dishes like pickles and chutney, salad dressing and meat flavoring due to its pungent flavor. It is also used to make mustard paste by simply adding water which is used in hot dogs and pretzels. <br>But simple changes such as adding mustard to meals could boost your metabolism, increase fat burning and help you lose belly fat. <br>While eating mustard alone is not going to make you reach your weight loss goals, adding it to a healthy diet can give your body an extra fat burning boost.