Swanson Thyroid Essentials, 90 Capsules supplement bottle
Swanson

Thyroid Essentials, 90 Capsules

What We Researched
14 active ingredients analyzed · 3 inactive ingredients decoded · 6 brand certifications checked · 2 retailers compared · Last updated: Mar 2026
83
Product Score Good
90
Brand Score Excellent

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Thiamin (from thiamin mononitrate)(vitamin B1) 25 mg 2,083%
Riboflavin (vitamin B2) 25 mg 1,923%
Niacin (as niacinamide) 25 mg NE 156%
Vitamin B6 (from pyridoxine HCL) 25 mg 1,471%
Folate (25 mcg folic acid) 40 mcg DFE 10%
Vitamin B12 (as cyanocobalamin) 25 mcg 500%
Pantothenic Acid(from calcium pantothenate) 25 mg 500%
Iodine (from kelp) 100 mcg 67%
Magnesium (from magnesium oxide) 25 mg 6%
Zinc (from zinc oxide) 25 mg 227%
Selenium (from selenomethionine) 50 mcg 91%
Copper (from copper gluconate) 2 mg 222%
L-Tyrosine 150 mg *
Coleus forskohlii(standardized to 10% forskolin)(root) 50 mg *
Bioavailability Good

Absorption Rating

  • Thiamin (from thiamin mononitrate)(vitamin B1) Fair
  • Riboflavin (vitamin B2) Good
  • Niacin (as niacinamide) Good
  • Vitamin B6 (from pyridoxine HCL) Fair
  • Folate (25 mcg folic acid) Fair
  • Vitamin B12 (as cyanocobalamin) Fair
  • Pantothenic Acid(from calcium pantothenate) Good
  • Iodine (from kelp) Good
  • Magnesium (from magnesium oxide) Poor
  • Zinc (from zinc oxide) Poor
  • Selenium (from selenomethionine) Good
  • Copper (from copper gluconate) Good
  • L-Tyrosine Good
  • Coleus forskohlii(standardized to 10% forskolin)(root) Good
Other Ingredients Excellent

Fillers & Additives

  • Rice Flour
  • Gelatin
  • Magnesium Stearate
Efficacy Good

Dosage Analysis

  • Thiamin (from thiamin mononitrate)(vitamin B1) 25 mg Effective
  • Riboflavin (vitamin B2) 25 mg Effective
  • Niacin (as niacinamide) 25 mg NE Effective
  • Vitamin B6 (from pyridoxine HCL) 25 mg Effective
  • Folate (25 mcg folic acid) 40 mcg DFE Under-dosed
  • Vitamin B12 (as cyanocobalamin) 25 mcg Effective
  • Pantothenic Acid(from calcium pantothenate) 25 mg Effective
  • Iodine (from kelp) 100 mcg Under-dosed
  • Magnesium (from magnesium oxide) 25 mg Under-dosed
  • Zinc (from zinc oxide) 25 mg Effective
  • Selenium (from selenomethionine) 50 mcg Effective
  • Copper (from copper gluconate) 2 mg Effective
  • L-Tyrosine 150 mg Under-dosed
  • Coleus forskohlii(standardized to 10% forskolin)(root) 50 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Thiamin (from thiamin mononitrate)(vitamin B1) 25 mg 2,083%
Riboflavin (vitamin B2) 25 mg 1,923%
Niacin (as niacinamide) 25 mg NE 156%
Vitamin B6 (from pyridoxine HCL) 25 mg 1,471%
Folate (25 mcg folic acid) 40 mcg DFE 10%
Vitamin B12 (as cyanocobalamin) 25 mcg 500%
Pantothenic Acid(from calcium pantothenate) 25 mg 500%
Iodine (from kelp) 100 mcg 67%
Magnesium (from magnesium oxide) 25 mg 6%
Zinc (from zinc oxide) 25 mg 227%
Selenium (from selenomethionine) 50 mcg 91%
Copper (from copper gluconate) 2 mg 222%
L-Tyrosine 150 mg *
Coleus forskohlii(standardized to 10% forskolin)(root) 50 mg *

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Rice Flour Safe

Natural bulking agent to fill capsule space. Hypoallergenic.

Gelatin Safe

Forms the capsule shell that holds the supplement contents.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$11$10$9$8$7 Mar 12 $9.00
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
Related Supplements
Frequently Asked Questions
Is Swanson Thyroid Essentials, 90 Capsules a good supplement?

Swanson Thyroid Essentials, 90 Capsules received a product quality score of 83/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 14 active ingredients All 3 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. 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 Thyroid Essentials, 90 Capsules?

Swanson Thyroid Essentials, 90 Capsules contains 14 active ingredients: Thiamin (from thiamin mononitrate)(vitamin B1) (25 mg), Riboflavin (vitamin B2) (25 mg), Niacin (as niacinamide) (25 mg NE), Vitamin B6 (from pyridoxine HCL) (25 mg), Folate (25 mcg folic acid) (40 mcg DFE), Vitamin B12 (as cyanocobalamin) (25 mcg), and 8 more. Notable high-dose ingredients include Thiamin at 2,083% DV, Riboflavin at 1,923% DV, Vitamin B6 at 1,471% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Swanson Thyroid Essentials, 90 Capsules safe to take?

Swanson Thyroid Essentials, 90 Capsules has been analyzed for ingredient safety across all its components. All 3 inactive ingredients — including capsule materials, fillers, and binders — are rated safe based on regulatory data and published safety research. This is a clean formulation with no controversial additives. 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.