Swanson Kelp, 250 Tablets supplement bottle
Swanson

Kelp, 250 Tablets

What We Researched
2 active ingredients analyzed · 8 inactive ingredients decoded · 6 brand certifications checked · 3 retailers compared · Last updated: Mar 2026
81
Product Score Good
90
Brand Score Excellent

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
lodine (from kelp) 225 mcg 150%
Atlantic Kelp(Ascophyllum nodosum) (standardized to 0.4% iodine) 56 mg *
Bioavailability Fair

Absorption Rating

  • lodine (from kelp) Fair
  • Atlantic Kelp(Ascophyllum nodosum) (standardized to 0.4% iodine) Fair
Other Ingredients Excellent

Fillers & Additives

  • Dicalcium Phosphate
  • Calcium Carbonate
  • Microcrystalline Cellulose (Plant Fiber)
  • Stearic Acid
  • Silica
  • Magnesium Stearate
  • Acacia
  • Maltodextrin
Efficacy Very Good

Dosage Analysis

  • Atlantic Kelp(Ascophyllum nodosum) (standardized to 0.4% iodine) 56 mg High

Supplement Facts

Ingredient Amount % Daily Value
lodine (from kelp) 225 mcg 150%
Atlantic Kelp(Ascophyllum nodosum) (standardized to 0.4% iodine) 56 mg *

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Dicalcium Phosphate Safe

Serves as both a filler and a supplemental source of calcium and phosphorus.

Calcium Carbonate Safe

Acts as a filler and provides supplemental calcium.

Microcrystalline Cellulose (Plant Fiber) Safe

It is used as a filler, binder, and disintegrant.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Acacia Generally_safe

It is used as a binder or thickener.

Maltodextrin Generally_safe

Helps carry and stabilize active ingredients. Provides bulk.

Price Comparison

iHerb $8.33
Best Price
Target $10.99

Price History

Tracked across major retailers. Updated periodically.

$10$9$8$7$6 Mar 12 $8.00
iHerb

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
Swanson

Founded 1969 · Fargo, North Dakota, United States · 994 products · swansonvitamins.com

Certifications

6 certifications
Consumerlab Verified
Nsf Gmp Verified Source
Fda Gmp Inspections Verified Source
Npa Gmp Verified Source
Usda Organic Verified Source
Vegan Certified Verified Source

Transparency

4 claims
Third Party Testing Claim — Verified Source
Coa Availability — Claimed Source
In House Testing — Verified Source

Violation History

6 incidents
Recall Vitamin B12 Methylcobalamin High Absorption2022-03-04Source
Lawsuit Website not accessible to blind individuals, violating the Americans with Disabilities Act (ADA).2019Source
Prop 65 Lead2015-11-03Source
Recall Swanson Premium Brand Full Spectrum Cilantro (Coriander)2014-04-04Source
Recall Swanson Organic Celery Seed (Whole)2011-12-16Source
Fda Warning Products contained an unauthorized drug (lovastatin) and were marketed with claims to treat high cholesterol, rendering them unapproved new drugs.2007-08-08Source
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Frequently Asked Questions
Is Swanson Kelp, 250 Tablets a good supplement?

Swanson Kelp, 250 Tablets received a product quality score of 81/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 2 active ingredients Of the 8 inactive ingredients, 6 are rated safe and 0 are flagged for review. The manufacturer, Swanson, holds a brand trust score of 90/100 with 6 verified certifications including Consumerlab, Nsf Gmp, Fda Gmp Inspections, Npa Gmp.

What are the ingredients in Swanson Kelp, 250 Tablets?

Swanson Kelp, 250 Tablets contains 2 active ingredients: lodine (from kelp) (225 mcg), Atlantic Kelp(Ascophyllum nodosum) (standardized to 0.4% iodine) (56 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Swanson Kelp, 250 Tablets safe to take?

Swanson Kelp, 250 Tablets has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Swanson a trustworthy supplement brand?

Swanson receives a brand trust score of 90/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1969 and headquartered in Fargo, North Dakota, United States, the company offers 994 products in their lineup. They hold 6 verified certifications including Consumerlab, Nsf Gmp, Fda Gmp Inspections, Npa Gmp. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Swanson has 6 historical regulatory incidents on record, which are factored into the trust score.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.