Buy Mustard at wholesale rates in the UK and Europe from IVY FOODS. Mustard seeds are small round seeds that are very beneficial as they are an important source of protein and oil. It is a major oilseed crop in South Asia and is used in many traditional folk medicines as well. From treating arthritis to chest congestion to muscular ache, mustards treat various ailments. Mustard and its condiments are popular for their extraordinary taste throughout the world.