Mustard seeds are the tiniest part�of the Brassica species of the mustard plant. They have a chemical composition that is advantageous, such as protein content and a reasonably well-balanced amino acid composition, as well as dietary fibre and natural antioxidants. Vitamin A, iron, and calcium are all abundant in mustard seeds. Small mustard seeds have a strong odour. Organic Mustard Seeds from Go Earth are natural�and have a delicious scent and flavour.