Laminara — answers to kelp (Laminaria species)
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A brown seaweed used as a food and supplement ingredient, most often as a natural source of iodine.
Why it’s used
Taken as a source of dietary iodine or as a general marine-derived nutrient ingredient.
What the evidence says
Iodine's role in thyroid function is well established, but the iodine content of kelp products varies widely and is often unlabeled or inconsistent between batches, which limits what can be said about this specific ingredient's effects at any given dose. Dedicated clinical research on Laminaria itself, apart from its iodine content, is sparse.
Where we looked
There was no paper to cite here, so this is the search instead — run it yourself and see what we saw.
- PubMed: 0 records · searched August 2026
"Laminara"[Title/Abstract] AND ("dietary supplements"[MeSH] OR supplementation[Title/Abstract] OR supplement[Title/Abstract] OR supplements[Title/Abstract] OR "oral administration"[Title/Abstract]) AND (randomized controlled trial[pt] OR clinical trial[pt] OR meta-analysis[pt] OR systematic review[pt]) AND humans[MeSH] - PubMed: 8 records · searched August 2026
"Laminara"[Title/Abstract]
This says what this database holds under these terms. It is not a finding that no research exists.
Context
No standardized dosing protocol for Laminaria exists in the research literature, largely because its iodine content is not consistently measured or reported across studies and products.
Educational information, not medical or safety advice. Consult a professional for allergies or medical concerns.