Nature's Way Standardized Soy Isoflavones supplement bottle
Nature's Way

Standardized Soy Isoflavones

What We Researched
2 active ingredients analyzed · 2 inactive ingredients decoded · 5 brand certifications checked · 1 retailer compared · Last updated: Mar 2026
90
Product Score Excellent
95
Brand Score Excellent

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Red Clover 140 mg
Soybean extract (as Isoflavones) 100 mg
Bioavailability Very Good

Absorption Rating

  • Red Clover Fair
  • Soybean extract (as Isoflavones) Good
Other Ingredients Excellent

Fillers & Additives

  • Plant-Derived Capsule
  • Magnesium Stearate
Efficacy Very Good

Dosage Analysis

  • Red Clover 140 mg High
  • Soybean extract (as Isoflavones) 100 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Red Clover 140 mg
Soybean extract (as Isoflavones) 100 mg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Plant-Derived Capsule Safe

It is used to enclose and deliver the supplement ingredients.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Price Comparison

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

Brand Trust Report
Nature's Way

Founded 1969 · Green Bay, Wisconsin, USA · 481 products · naturesway.com

Certifications

5 certifications
Consumerlab Verified Source
Labdoor Verified Source
Non Gmo Project Verified Source
Nsf Gmp Verified Source
Usda Organic Verified Source

Transparency

5 claims
Third Party Testing Claim — Verified Source
Coa Availability — Claimed Source
Testing Lab Disclosure — Verified Source
In House Testing — Verified Source

Violation History

3 incidents
Fda Warning Violations of the Foreign Supplier Verification Program (FSVP) regulation.2022-12-20Source
Lawsuit Mislabeled and fraudulent herbal supplements.2015Source
Recall Nettle capsules2002-06-28Source
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Frequently Asked Questions
Is Nature's Way Standardized Soy Isoflavones a good supplement?

Nature's Way Standardized Soy Isoflavones received a product quality score of 90/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 2 active ingredients All 2 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Nature's Way, holds a brand trust score of 95/100 with 5 verified certifications including Consumerlab, Labdoor, Non Gmo Project, Nsf Gmp.

What are the ingredients in Nature's Way Standardized Soy Isoflavones?

Nature's Way Standardized Soy Isoflavones contains 2 active ingredients: Red Clover (140 mg), Soybean extract (as Isoflavones) (100 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Nature's Way Standardized Soy Isoflavones safe to take?

Nature's Way Standardized Soy Isoflavones has been analyzed for ingredient safety across all its components. All 2 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 Nature's Way a trustworthy supplement brand?

Nature's Way receives a brand trust score of 95/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1969 and headquartered in Green Bay, Wisconsin, USA, the company offers 481 products in their lineup. They hold 5 verified certifications including Consumerlab, Labdoor, Non Gmo Project, Nsf Gmp. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Nature's Way has 3 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.