Swanson
9 products scored by Formulate's ingredient-level rubric. Brand grade reflects a weighted average across the full lineup.
Scored by the Formulate Research Team · Last reviewed July 2026
How Swanson scored
Accurate labels, no proprietary blends hiding doses, consistent sourcing
Ingredient form, bioavailability, dose accuracy across the lineup
Published testing, ingredient origins, full disclosure
USP, NSF, Informed Sport, or comparable third-party testing coverage
New formulations, new forms, research-driven development
Component scores are derived from the product lineup, not from marketing materials. See the methodology page for how each component is computed.
What Swanson makes
- 3 Amino Acids
- 2 Vitamin D
- 1 Antioxidants
- 1 Vitamin K
- 1 Vitamin C
- 1 Probiotics
Top-scoring products
All Swanson products (9)
- Vitamins D3 & K2 - 2,000 IU & 75 mcgVitamin D92
- Ultimate Ocular Antioxidant - Featuring Lutemax 2020Antioxidants91
- Extra Strength D3 & K2 - 5,000 IU & 100 mcgVitamin D90
- Real Food Vitamin K2 - Maximum StrengthVitamin K90
- GABAplex with L-Tyrosine & L-TheanineAmino Acids84
- Ultimate Respiratory Defense with NAC and QuercetinAmino Acids84
- GlycineAmino Acids82
- Vitamin C Gummies - OrangeVitamin C81
- Epic Pro 25-Strain ProbioticProbiotics76
Swanson: frequently asked questions
How does Formulate grade Swanson?
Formulate grades Swanson by aggregating the ingredient-level scores of all 9 Swanson products it has analyzed — weighing dose accuracy, ingredient form, transparency, and third-party testing. Swanson's overall brand grade is C (73/100). It is not a paid or sponsored ranking.
Is Swanson third-party tested?
Swanson scores 60/100 on third-party verification — meaning third-party testing coverage is limited across its lineup. Check individual product pages for which specific products are certified.
What is Swanson's best supplement?
Vitamins D3 & K2 - 2,000 IU & 75 mcg is Swanson's highest-scoring product on Formulate at 92/100 (grade A).
What does Swanson make?
Formulate has scored 9 Swanson products, including 3 Amino Acids, 2 Vitamin D, 1 Antioxidants, 1 Vitamin K, and more.
About the grading
Every Swanson product above is scored on dose accuracy, ingredient form, certifications, transparency, and third-party testing. The brand grade aggregates those product scores — it isn't a marketing claim or a pay-for-play ranking. See the methodology page for the full rubric.