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Dehydrated Seaweed
Dehydrated Seaweed
Low concern
Dehydrated seaweed is rich in iodine, minerals, and fiber. Iodine content can be very high in kombu/kelp, posing a risk of excess iodine intake (causing thyroid dysfunction) if consumed in large amounts regularly.
Found in
52 products
What it is
Various seaweeds (kombu, wakame, nori, dulse) dried for storage and use as food.
Whole food; flavor and umami source; thickener via natural alginates.
Why it's flagged
- High iodine content (especially kombu/kelp)
- Possible heavy metal accumulation (arsenic, cadmium)
- Sodium content
What regulators actually say
"Seaweed (such as kelp, nori, kombu, and wakame) is one of the best food sources of iodine, but levels can vary widely."
"Inorganic arsenic in certain seaweed products (notably hijiki) can reach levels of concern."
Regulatory status
United States — FDA
Permitted whole food
European Union — EFSA
Permitted; EFSA has issued opinions on iodine and arsenic in seaweed
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