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evidence · mechanism · dose
Supplements/Herb

Bladderwrack

Fucus vesiculosus seaweed for thyroid.

Hormone Balance

Overview

Fucus vesiculosus seaweed for thyroid.

Natural sources
    Common forms

      Mechanism of action

      Natural iodine source.

      Pathways

        Effects on the body

        Organ system effects

        Evidence-based benefits

        Thyroid support

        Moderate evidence

        Potential side effects

        Common
        • · Hyperthyroidism
        • · Arsenic risk
        Rare
          Serious

            Drug interactions

            No notable interactions reported.

            Safety & non-supplemental interactions

            Educational summary — always confirm with your clinician or pharmacist before starting, stopping, or combining with prescription therapy.

            Avoid if you are
            • ·Pregnant or breastfeeding (insufficient safety data)
            • ·Children under 18 (unless directed by a clinician)

            Supplement interactions

            Pairs well with

            None listed.

            Avoid combining with

            No specific avoidances listed.

            Dosing & bioavailability

            Typical dose
            500 mg

            Where to buy

            Affiliate-style search links to reputable retailers. We don't endorse specific brands — verify third-party testing (USP, NSF, Informed Sport) before purchase.

            Herb
            Bladderwrack
            Amazon
            Wide selection · fast shipping
            Herb
            Bladderwrack
            iHerb
            Global delivery · curated brands
            Herb
            Bladderwrack
            Thorne
            Practitioner-grade · NSF tested

            Scientific evidence (8)

            Systematic reviewThyroid Res · 2007

            Seaweed for thyroid

            Teas J, et al.

            Clinical review

            Key findings

            Iodine source with variable content.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Bladderwrack — Thyroid support

            Live PubMed search

            Live results for "Bladderwrack Thyroid support" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Bladderwrack and "Thyroid support". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Bladderwrack — randomized controlled trial

            Live PubMed search

            Live results for "Bladderwrack randomized controlled trial" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Bladderwrack and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Bladderwrack — meta-analysis

            Live PubMed search

            Live results for "Bladderwrack meta-analysis" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Bladderwrack and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Bladderwrack — pharmacokinetics

            Live PubMed search

            Live results for "Bladderwrack pharmacokinetics" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Bladderwrack and "pharmacokinetics". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Bladderwrack — safety adverse events

            Live PubMed search

            Live results for "Bladderwrack safety adverse events" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Bladderwrack and "safety adverse events". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Bladderwrack — dose response

            Live PubMed search

            Live results for "Bladderwrack dose response" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Bladderwrack and "dose response". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewGoogle Scholar · 1970

            Google Scholar: Bladderwrack — clinical evidence

            Live Scholar search

            Cross-database citation index for Bladderwrack as it relates to "clinical evidence".

            Key findings

            Includes preprints, theses, and journal articles. Useful for tracking citation counts and follow-on work.

            Open study
            Educational use only. This profile is not medical advice. Consult a qualified healthcare professional before starting any supplement, especially if you take prescription medication or have a chronic condition.