Kelp is a type of seaweed that is naturally rich in iodine. It is often used in supplements as a natural iodine source due to its high concentration and plant-based origin.

The kelp is geothermally dried at low temperatures. This method helps preserve the natural nutrients as well as possible.

The kelp comes from the crystal-clear, cold waters around Iceland. It is harvested responsibly there with attention to sustainable ocean management.

Iodine from kelp is a natural, plant-based source derived from seaweed. Synthetic forms such as potassium iodide are made in the laboratory. Bonusan Iodine 150 uses only kelp as its source.

Iodine occurs naturally in sea products such as seaweed (kelp), fish, shellfish and crustaceans. In smaller amounts, it is also present in dairy, eggs, and plant-based products depending on the soil in which they are grown. In some countries, iodine is also added to table salt (iodized salt).