Swanson
Seaweed Vegetable Complex
55/100
SUPPIE SCORE
45/100
EFFICACY
Low
SAFETY
96/100
CLEANLINESS
What Does Seaweed Vegetable Complex Do?
Iodine (from Atlantic Kelp) provides 400 mcg a day, above the studied range of 150-290 mcg/day. Four of the five actives with a studied range are below it.
What is the exact iodine content per serving in this sea vegetable complex?
Is this supplement safe if I already take a multivitamin with iodine?
How long should I take it before expecting changes in thyroid labs?
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What Are the Benefits of Seaweed Vegetable Complex?
Based on proven scientific research
Thyroid FunctionMild
Iodine StatusModerate
Antioxidant SupportMild
Immune ModulationSlight
Metabolic HealthMild
Good For:
What Are the Side Effects of Swanson Seaweed Vegetable Complex?
Always consult your health practitioner if in doubt.
RiskHigh Risk
Overview
•Seaweed-derived iodine content is highly variable and often undisclosed, risking excess intake that can raise TSH and induce hypothyroidism or hyperthyroidism.
•Studies on habitual seaweed consumers show median urinary iodine far exceeding safe levels, with corresponding increases in TSH.
•Individuals with pre-existing thyroid conditions, those on antithyroid drugs, pregnant women, or neonates should avoid or use extreme caution due to risk of thyroid dysfunction.
•Potential for iodine-induced thyrotoxicosis followed by prolonged hypothyroidism has been documented with kelp-containing products.
•May contain trace heavy metals depending on sourcing, although not specified on this label.
Potential Side Effects
Negative Interactions
Allergens
None listed on label
Inactive Ingredients
Hypromellose (vegetarian capsule)
Low RiskMagnesium stearate
Low RiskWhat Are the Ingredients in Swanson Seaweed Vegetable Complex?
Iodine (from Atlantic Kelp)
400 mcg
Atlantic Kelp (Ascophyllum nodosum) (thallus)
100 mg
Dulse Seaweed (Palmaria palmata) (thallus)
100 mg
Earthrise® Spirulina (Arthrospira platensis) (blue-green microalgae)
100 mg
Chlorella (Chlorella vulgaris) (broken cell wall)
100 mg
Fucoidan Extract (from brown seaweed) (Laminaria japonica, Cystoseira canariensis) (standardized to 40% total polysaccharides, 5% seaweed phenolics)
100 mg
Irish Moss (Chondrus crispus Fam. Gigartinaceae) (dried plant)
100 mg
Red Algae (Gigartina skottsbergii) (standardized to 70% polysaccharides, 70 mg)
100 mg
Hypromellose (vegetarian capsule)
Magnesium stearate
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Dosage & Bioavailability
How the active doses and forms in Seaweed Vegetable Complex compare to the research.
•Iodine (from Atlantic Kelp) 400 mcg a day, above the studied range (150-290 mcg/day).
•Red Algae (Gigartina skottsbergii) standardised to 70% polysaccharides, about 0.07 g polysaccharides a day.
Sources & References
Swanson greenfoods formulas seaweed vegetable complex 60 veg caps
Information from www.swansonvitamins.com
Swanson vitamins seaweed vegetable complex 60 veggie capsules 118024
Information from www.vitacost.com
232336.pdf
Information from api.ods.od.nih.gov
PMC4216876
Information from pmc.ncbi.nlm.nih.gov
PMC8077470
Information from pmc.ncbi.nlm.nih.gov
PMC11012840
Information from pmc.ncbi.nlm.nih.gov
175904.pdf
Information from api.ods.od.nih.gov
Frequently Asked Questions
Common questions about Swanson Seaweed Vegetable Complex