Compound Profile

Fucoxanthin

Fucoxanthin carries a Grade C rating — limited evidence.

Last reviewed: •1 source citedReport a correctionProfile-wide ·C Limited

Use extra caution — Generally well tolerated; limited long term safety data. Details

Evidence
Limited evidence
Typical onset
Varies by prep
Safety rating
Use extra caution: Generally well tolerated
Best for
UCP1, Fat Oxidation
Avoid / review if
May Interact With Diabetes Medication And Potentiate Hypoglycemia.
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Fucoxanthin monograph visual
Generated profile category visual

Safety

Safety & Cautions

Generally well tolerated; limited long term safety data.

High caution

Caution level: High. Multiple caution categories apply, or the record uses avoid/contraindication language.

  • Interaction-AwareMedication or interaction context is explicitly noted.
  • Anticoagulant CautionBleeding or anticoagulant-adjacent caution language is present.
  • Pregnancy/Breastfeeding CautionPregnancy or breastfeeding caution language is present.

Evidence-based safety

Caution when combined

Severity and certainty are shown separately. A high-priority caution can still be theoretical: these pairings are screened from shared contraindication mechanisms and are not automatically documented clinical interactions. Provenance identifies the source fields that produced each flag; it does not upgrade the certainty of the pairwise claim.

High-Priority Caution

147 flagged pairings

Bleeding / anticoagulant risk

Representative pairings are shown below. Large mechanism groups are intentionally summarized to keep profiles focused and crawl-efficient.

Bleeding / anticoagulant riskCertainty: Theoretical

Data provenance recorded for 147 of 147 pairings in this mechanism group.

+135 more pairings share this mechanism. Use the Safety Checker to review a specific combination.

Moderate Caution

110 flagged pairings

Blood-sugar lowering

Representative pairings are shown below. Large mechanism groups are intentionally summarized to keep profiles focused and crawl-efficient.

Blood-sugar loweringCertainty: Theoretical

Data provenance recorded for 110 of 110 pairings in this mechanism group.

+98 more pairings share this mechanism. Use the Safety Checker to review a specific combination.

Evidence Summary

Profile-wide ·C Limited

Evidence lens

Read as directional context, not settled clinical proof.

LimitedLimited evidence

Human clinical evidence: Present in source signals

Mechanistic / preclinical: Mechanism mapped — Metabolic Regulation · Glucose Metabolism Support · Glucose Metabolism

Research maturity: Emerging research — main contexts: UCP1 · Fat Oxidation

Safety boundary: Safety note available — Generally well tolerated; limited long term safety data.

This profile cites 1 human study.

Evidence Strength

Confidence estimate based on the design quality and consistency of published clinical trials.

Limited evidence

Fucoxanthin has a limited evidence rating.

General wellnessGeneral wellness
Citation density
0.5
Sources
1
Effects
2
Research recency
Mixed recency
Evidence Grade

Grade C: Limited Evidence

Evaluation of methodological rigor, population reach, and evidence alignment.

Design Match
Randomized controlled trial
Risk of Bias
Low
Consistency
Not assessed
Strongest recorded design is a randomized controlled trial, drawn from 2 recorded studies, 2 in people.
How evidence grades work

Each grade reflects the strength and consistency of published human evidence — not marketing claims. Grades are based on study count, design quality, effect size, consistency, and recency.

Strong
Multiple RCTs, consistent direction, adequate effect size
Moderate
Some RCTs or consistent observational data in humans
Preliminary / Mixed
Animal or in-vitro only, or conflicting human data
Traditional / Theoretical
Traditional use only; no controlled human trials
Clinical Study Summaries (1)1 human evidence source · 1 human trial · ~28 participants across 1 human evidence source with reported N · Consistency not yet classifiable

What the evidence actually shows

This table contains 1 structured source, including 1 human evidence source; 1 is a human trial. Across 1 human evidence source with a reported sample size, the approximate participant total is 28; overlapping publications may include some of the same people.

StudyDesignNDoseDurationPopulationOutcomeResult & magnitudeSource

Effect of Fucoxanthin on Metabolic Syndrome, Insulin Sensitivity, and Insulin Secretion

PubMed · J Med Food · 2023

Background
Randomized controlled trial

Randomly assigns participants to interventions or controls, reducing many sources of bias when the trial is conducted well.

n=28—————PubMed →

How Fucoxanthin Works

Simplified mechanism pathway based on preclinical and pharmacological evidence. Does not confirm clinical efficacy.

Mechanism Pathway — How Fucoxanthin Works

How Fucoxanthin WorksFucoxanthin acts on biological target pathways via metabolic (regulation), leading to ucp1.FucoxanthinBiological TargetBiological pathwayMetabolicRegulationUcp1Observable outcomeGlucoseRegulation
CompoundTarget / ReceptorMechanismEffect / Outcome

Dosing

Common form
standardized extract
No standardized dose
Our source data records the usual product form for this ingredient but no studied dose. Preparations differ widely, so follow the standardization on the product you actually have and speak to a clinician before starting.
Mechanisms & biological pathways

Preclinical mechanism details from scientific profiles; these represent plausible pathways but do not guarantee clinical efficacy in humans.

  • Metabolic Regulation
  • Glucose Metabolism Support
  • Glucose Metabolism

Compare & Sourcing

Compare side-by-side tradeoffs or verify active marker guidelines.

Review available sources for Fucoxanthin

Independent database mapping — evaluated separately from safety and efficacy scores.

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Safety first · Harm reduction

This information is educational and not medical advice. Start low, avoid risky combinations, and consult a licensed clinician before making health decisions—especially if you use medications, have diagnosed conditions, or are pregnant/breastfeeding.

Learn how we evaluate confidence, safety, and intensity on the methodology page.

By Willie B. Randolph III

Founder & Head Researcher · Oak Ridge, TN · Last reviewed August 2026

Editorial Review

Checked against primary sources, cited evidence, and contraindication language before publication. Evidence claims, safety language, and affiliate modules are reviewed independently. Not personal medical advice.

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