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Fucus Vesiculosus Powder
Fucus Vesiculosus Powder
Moderate concern
Bladderwrack contains highly variable iodine and can cause thyroid dysfunction at high doses; heavy metals (arsenic, cadmium) can accumulate from seawater. Caution in pregnancy and thyroid conditions.
Found in
4 products
What it is
Powdered bladderwrack seaweed (Fucus vesiculosus), naturally rich in iodine.
Iodine source, mineral fortification, traditional supplement use.
Why it's flagged
- excessive iodine intake
- heavy metal contamination
- thyroid effects
What regulators actually say
"Some seaweed (such as kelp) contains very high amounts of iodine and can cause an iodine intake well above the UL."
Regulatory status
United States — FDA
Marketed as dietary supplement; no specific food additive approval
European Union — EFSA
Tolerable upper intake of iodine 600 µg/day for adults
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