Nature’s Own Kelp has organic status & is from a sustainable source that is guaranteed free from all impurities & pollutants. The Kelp is naturally high in iodine containing 280ug per gluten-free capsule. Nature’s Own Organic Kelp Supplement contains 3 species of wild bladderwrack (the type of seaweed). As well as the high iodine content, the Kelp contains a broad array of minerals, trace elements, micro-nutrients, vitamins, prebiotics & carotenoids.