Nature's Way Kelp 600mg per Serving by Circle Nutrition Center CNC $15.99 100 Capsules - $15.99 100 Capsules Size 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Kelp Guaranteed to contain 0.06% iodine Kelp is a nutritional seaweed. This species grows in the tides of coastal ocean waters from zero to ten feet deep.