Mustard seeds are the small round seeds of various mustard plants. The seeds are usually about 1 to 2 millimetres in diameter and may be colored from yellowish white to black Weight ; 1 Kg Calories : 508 Total Fat : 36 G Saturated Fat : 2 G Cholesterol : 0 Mg Sodium : 13 Mg Potassium : 738 Mg Total Carbohydrate : 28 G Protein : 26 G