Seaweed is one of the best foods to keep in your pantry. Not only are they incredibly shelf-stable, but they add complex flavors to many types of meals, including soups, delicious and fried breakfasts. Their nutritional density, however, is where they really shine. Seaweed is packed with vital nutrients, vitamins and minerals. In fact, they contain almost all the essential amino acids, minerals and trace elements that the human body needs.