2. Seaweed – Not Always the Reliable Source it Seems
Turning to our second fact, we explore the topic of seaweed. Often hailed as the poster child of iodine sources for vegans, seaweed does pack a powerful iodine punch. However, it’s not always the reliable iodine source it’s often made out to be.
Seaweed’s iodine content can fluctuate wildly, primarily because it’s so dependent on the waters where it grows. Some types of seaweed, such as kelp, can contain incredibly high levels of iodine.
So high, in fact, that overconsumption can potentially lead to iodine toxicity. This is particularly problematic when you consider that there aren’t any universal guidelines about how much seaweed is safe to consume daily.
Moreover, the form of iodine found in seaweed may not be readily absorbable by our bodies. A study in the Journal of Food and Drug Analysis highlighted that certain seaweed species contain iodine primarily in the form of iodate. This form of iodine is less bioavailable than the iodide form found in many supplements and fortified foods, meaning it might not contribute as effectively to our iodine needs.
In light of these insights, the take-home message is clear. While seaweed can certainly contribute to a vegan’s iodine intake, it should not be the sole source. A balanced approach that includes a variety of iodine sources is the most sensible strategy. This might also include a vegan-friendly iodine supplement, particularly for those with high iodine needs or those living in areas where iodine-rich foods are hard to come by. (2)
