Hi Christie
Thank you very much for your interesting question.
Iodine absorption is an important issue. It is true that iodine IS absorbed through the skin. If you have to avoid iodine, consider this. This article tells you more about iodine absorption. Seaweed is rich in iodine.Particulary Kombu as well as Wakame seaweeds are both very rich in iodine. However, there are just very small amounts of seaweed in creams and lotions. Excessive,daily use of cosmetics can cause problems.
Best regars Outi

Hi, I have a question about using kelp/seaweed ingredients in cosmetics and skin care for people with autoimmune thyroid disease (Hashimoto’s). Since they often contain iodine, which is not recommended to be ingested with thyroid disease, I am wondering if it is an issue when applied topically. It is difficult to get a consistent answer since some contend topical products do not enter the bloodstream, while others say the skin is very absorbent (and the largest organ) and anything applied topically is absorbed & has the same effect. I don’t know how much iodine is typically present in a topical product using kelp/seaweed and whether it is enough to make much difference. What are your thoughts?
Thanks!