Seagreens iodine capsules 60s each capsule contains 100 pure seagreens human food quality seaweed which in turn typically contains 350 micrograms of natural iodine we carefully micronise a single iodine rich seaweed variety called ascophyllum nodosum and seal it in a vegetable capsule we harvest only fresh living plants which then re grow recent research by glasgow university compared seagreens ascophyllum to an artificial form of potassium iodide the study found that potassium iodide is