Laminaria Digitata Powder
Laminaria digitata is naturally very high in iodine; concentrations can exceed the EFSA tolerable upper intake level (600 µg/day for adults). Excess iodine can cause thyroid dysfunction.
What it is
Dried, ground brown seaweed (oarweed/kelp); used in foods, supplements, and cosmetics.
Source of iodine; flavoring/thickener.
Why it's flagged
- very high iodine content
- risk of thyroid dysfunction at high intakes
What regulators actually say
"The Panel established a tolerable upper intake level (UL) for iodine of 600 µg/day for adults... Some seaweed-based foods and supplements may contain high levels of iodine and may exceed the UL."
Regulatory status
United States — FDA
Seaweeds are GRAS as food when properly identified; iodine content not separately limited in food.
European Union — EFSA
EFSA has issued opinions warning that brown seaweed powders can deliver iodine far above the tolerable upper intake level.
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