Kombu (giant sea kelp) 22,000 mg/100g ParmigianoReggiano 12,000 Bonito 2,850 Sardines/Anchovies 2,800 Tomato Juice 2,600 Tomatoes 1,400 Pork 1,220 Beef 1,070 Chicken 760 Mushrooms 670 Soybeans 660 Carrots 330