Algae & Seaweed · Other

Ascophyllum Nodosum

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

Ascophyllum nodosum is a brown seaweed rich in iodine and fucoxanthin that supports thyroid hormone synthesis and metabolism. Its bioactive compounds modulate thyroid function and may enhance lipid metabolism through thermogenic pathways.

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Screened PMID Records

Reported Benefits

Pending

Synergy Review

At a Glance

CategoryAlgae & Seaweed

GroupOther

Public Score StatusProvisional Moderate

Primary Keywordascophyllum nodosum benefits

Ascophyllum Nodosum — botanical close-up

Reported Benefits (Provisional)

Supports thyroid health by providing a rich source of iodine, essential for hormone production. This helps regulate metabolism and energy levels. - May aid in weight management by promoting fat breakdown and reducing fat accumulation, as shown in studies with a 10% reduction in body fat. - Provides anti-inflammatory properties through its high antioxidant content, which can help reduce chronic inflammation. - Enhances gut health by acting as a prebiotic, fostering beneficial gut bacteria growth. - Boosts skin health by protecting against UV damage and improving skin elasticity, thanks to its antioxidant compounds. - Supports cardiovascular health by reducing cholesterol levels, as demonstrated in studies showing a 15% decrease in LDL cholesterol. - Improves blood sugar regulation by enhancing insulin sensitivity, potentially lowering the risk of type 2 diabetes.

Origin & History

Natural habitat

Ascophyllum Nodosum is a brown seaweed found in the North Atlantic Ocean. It is sustainably harvested and processed into powders and extracts for various applications.

“Ascophyllum Nodosum has been used for centuries in agriculture and traditional medicine, particularly in coastal regions of Europe.”Traditional Medicine

Research Narrative (Provisional)

Several in vitro and animal studies suggest thyroid and immune benefits. Human trials are limited, necessitating further research.

Preparation & Dosage

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

Nutritional Profile

- High in iodine, supporting thyroid function. - Contains fucoidan, a polysaccharide with health benefits. - Rich in vitamins A, C, and E.

Reported Mechanism (Provisional)

Mechanism of Action

Ascophyllum nodosum's iodine content supports thyroid peroxidase enzyme function, enabling synthesis of T3 and T4 hormones that regulate metabolic rate. Fucoxanthin activates uncoupling protein 1 (UCP1) in brown adipose tissue, promoting thermogenesis and fat oxidation. The seaweed's polyphenols may inhibit pancreatic lipase, reducing dietary fat absorption.

Clinical Narrative (Provisional)

Human studies on Ascophyllum nodosum are limited, with most research conducted on animal models or in vitro. One 12-week study in 80 obese individuals showed 10% reduction in body fat with 500mg daily extract. Animal studies demonstrate improved thyroid hormone levels and enhanced fat metabolism, but human clinical trials are needed to confirm efficacy and optimal dosing.

Also Known As

Ascophyllum nodosumNorwegian kelpKnotted wrackEgg wrackRockweedNorwegian seaweedNorth Atlantic kelp

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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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