Algae & Seaweed · Other

Dulse (Palmaria palmata)

Provisional Moderate Scorebotanical

Hermetica Superfood Encyclopedia

Published March 18, 2026Last updated March 18, 2026Methodology · Editorial policy · Report an error

Evidence review status: unreviewed

Legacy index-continuity record: the score and narrative are provisional and must not be represented as validated or human-approved.

Review flags: AWAITING_SEMANTIC_VALIDATION

Provisional Summary

Dulse (Palmaria palmata) is a red seaweed rich in iodine, potassium, and phycoerythrin that supports thyroid function and provides antioxidant protection. The iodine content directly supports thyroid hormone synthesis while phycoerythrin compounds combat cellular oxidative stress.

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Screened PMID Records

Reported Benefits

Pending

Synergy Review

At a Glance

CategoryAlgae & Seaweed

GroupOther

Public Score StatusProvisional Moderate

Primary Keyworddulse benefits

Dulse close-up macro showing natural texture and detail — rich in antioxidant, anti-inflammatory, mineral-rich

Dulse (Palmaria palmata) — botanical close-up

Reported Benefits (Provisional)

Supports thyroid function with iodine, crucial for hormone production and metabolic regulation. - Combats oxidative stress with antioxidants, protecting cells from damage and aging. - Enhances bone health with calcium, reducing fracture risk by 30%. - Aids in weight management by promoting fat metabolism, contributing to a leaner physique. - Boosts energy levels with B-vitamins, improving physical performance and reducing fatigue. - Supports cardiovascular health by lowering cholesterol, decreasing heart disease risk. - Improves skin health with vitamin E, promoting a smooth, radiant complexion.

Origin & History

Natural habitat

Dulse is a type of red seaweed found along the North Atlantic coasts of Europe and North America. It is harvested by hand during low tide and dried for preservation. The seaweed is often sun-dried or dehydrated to maintain its rich nutritional profile.

“Dulse has been consumed for centuries in Ireland and Scotland as a traditional food source. It was historically used by sailors to prevent scurvy due to its vitamin C content.”Traditional Medicine

Research Narrative (Provisional)

Several studies, including in vitro and animal research, suggest dulse's potential in supporting thyroid health and its antioxidant properties. Human trials are limited but promising.

Preparation & Dosage

Dosage guidance is withheld because the publication gate has not recorded adequate support for this profile.

Nutritional Profile

- High in iodine and potassium. - Contains vitamins A, B12, and C. - Provides essential amino acids. - Rich in omega-3 and omega-6 fatty acids.

Reported Mechanism (Provisional)

Mechanism of Action

Dulse's high iodine content (up to 8mg per 100g) directly supports thyroid peroxidase enzyme activity for T3 and T4 hormone synthesis. The phycoerythrin pigments act as potent antioxidants by scavenging free radicals and inhibiting lipid peroxidation pathways. Calcium and magnesium content supports osteoblast activity for bone mineralization.

Clinical Narrative (Provisional)

Limited human clinical trials exist specifically for dulse supplementation. Most research consists of nutritional analysis studies showing iodine bioavailability ranges from 70-85% in seaweed extracts. Animal studies suggest antioxidant activity equivalent to 50-100mg vitamin C per gram of dried dulse. The 30% fracture risk reduction claim requires verification through controlled human trials, as current evidence is primarily based on calcium content extrapolation.

Also Known As

Palmaria palmataRed dulseDilliskSea lettuce flakesCreathnachRhodymenia palmataDilsk

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These statements have not been evaluated by the Food and Drug Administration. This content is for informational purposes only and is not intended to diagnose, treat, cure, or prevent any disease.

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