GNC SuperFoods Soy Isoflavone Concentrate 50 mg supplement bottle
GNC SuperFoods

Soy Isoflavone Concentrate 50 mg

What We Researched
1 active ingredient analyzed · 6 inactive ingredients decoded · 2 retailers compared · Last updated: Mar 2026
100
Product Score Excellent
62
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Soy Isoflavone concentrate (as Isoflavones) 50 mg †
Bioavailability Excellent

Absorption Rating

  • Soy Isoflavone concentrate (as Isoflavones) Good
Other Ingredients Excellent

Fillers & Additives

  • Microcrystalline Cellulose
  • Gelatin
  • Stearic Acid
  • Hydroxypropylcellulose
  • Magnesium Stearate
  • Silica
Efficacy Excellent

Dosage Analysis

  • Soy Isoflavone concentrate (as Isoflavones) 50 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Soy Isoflavone concentrate (as Isoflavones) 50 mg †

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Microcrystalline Cellulose Safe

Adds bulk to small-dose supplements to make tablets/capsules a manageable size.

Gelatin Safe

Forms the capsule shell that holds the supplement contents.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Hydroxypropylcellulose Generally_safe

It is added to bind ingredients together and provide a smooth coating.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Price Comparison

GNC $7.50
Best Price

Price History

Tracked across major retailers. Updated periodically.

$10$8$8$6$6 Mar 12 $7.50
GNC

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

Brand Trust Report
GNC SuperFoods

Founded 1935 · Pittsburgh, Pennsylvania, USA · 30 products · gnc.com/

Transparency

3 claims
Third Party Testing Claim — Claimed Source
In House Testing — Verified Source

Violation History

5 incidents
Lawsuit Misrepresenting the amount of elemental magnesium in 'Super Magnesium' supplements.2024Source
Lawsuit Selling Vitamin E Skin Oil that primarily contained vegetable oil.2020Source
Lawsuit Deceptively labeling dietary supplements regarding FDA approval.2019Source
Recall GNC Women's Ultra Mega Time Release 180 count2016-11-16Source
Lawsuit Selling 'all-natural' supplements containing dangerous illegal drugs (BMPEA).2015Source
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Frequently Asked Questions
Is GNC SuperFoods Soy Isoflavone Concentrate 50 mg a good supplement?

GNC SuperFoods Soy Isoflavone Concentrate 50 mg received a product quality score of 100/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 1 active ingredients Of the 6 inactive ingredients, 5 are rated safe and 0 are flagged for review. The manufacturer, GNC SuperFoods, holds a brand trust score of 62/100.

What are the ingredients in GNC SuperFoods Soy Isoflavone Concentrate 50 mg?

GNC SuperFoods Soy Isoflavone Concentrate 50 mg contains 1 active ingredients: Soy Isoflavone concentrate (as Isoflavones) (50 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is GNC SuperFoods Soy Isoflavone Concentrate 50 mg safe to take?

GNC SuperFoods Soy Isoflavone Concentrate 50 mg 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 GNC SuperFoods a trustworthy supplement brand?

GNC SuperFoods receives a brand trust score of 62/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1935 and headquartered in Pittsburgh, Pennsylvania, USA, the company offers 30 products in their lineup. Note: GNC SuperFoods has 5 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.