21st Century Standardized Milk Thistle Extract, 60 Vegetarian Capsules supplement bottle
21st Century

Standardized Milk Thistle Extract, 60 Vegetarian Capsules

What We Researched
1 active ingredient analyzed · 4 inactive ingredients decoded · 2 brand certifications checked · 3 retailers compared · Last updated: Mar 2026
50
Product Score Poor
76
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Milk ThistlePowdered Extract (seed) standardized concentrate of Silybum marianum (seed) 175 mg **
Bioavailability Very Poor

Absorption Rating

  • Milk ThistlePowdered Extract (seed) standardized concentrate of Silybum marianum (seed) Poor
Other Ingredients Excellent

Fillers & Additives

  • Cellulose
  • Starch
  • Magnesium Stearate
  • Silicon Dioxide
Efficacy Very Poor

Dosage Analysis

  • Milk ThistlePowdered Extract (seed) standardized concentrate of Silybum marianum (seed) 175 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Milk ThistlePowdered Extract (seed) standardized concentrate of Silybum marianum (seed) 175 mg **

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Cellulose Safe

Provides bulk and structure in tablets and capsules.

Starch Generally_safe

It is used as a filler, binder, or thickener.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$8$7$6$5$4 Mar 12 $6.00
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
21st Century

Founded 1991 · Tempe, Arizona, United States · 231 products · 21stcenturyvitamins.com/

Certifications

2 certifications
Consumerlab Verified
Nsf Gmp Verified Source

Transparency

4 claims
Third Party Testing Claim — Claimed Source
Testing Lab Disclosure — Verified Source
In House Testing — Verified Source

Violation History

4 incidents
Prop 65 Lead2021-06-22Source
Recall Vitamin D3 5000 IU Tablets2021-05-19Source
Lawsuit False advertising of Glucosamine/Chondroitin supplements.2012Source
Prop 65 Lead2008-12-23Source
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Frequently Asked Questions
Is 21st Century Standardized Milk Thistle Extract, 60 Vegetarian Capsules a good supplement?

21st Century Standardized Milk Thistle Extract, 60 Vegetarian Capsules received a product quality score of 50/100 in GoodSupp's independent analysis, indicating several areas of concern that consumers should review. The product contains 1 active ingredients with 30 servings per container. Of the 4 inactive ingredients, 3 are rated safe and 0 are flagged for review. The manufacturer, 21st Century, holds a brand trust score of 76/100 with 2 verified certifications including Consumerlab, Nsf Gmp.

What are the ingredients in 21st Century Standardized Milk Thistle Extract, 60 Vegetarian Capsules?

21st Century Standardized Milk Thistle Extract, 60 Vegetarian Capsules contains 1 active ingredients: Milk ThistlePowdered Extract (seed) standardized concentrate of Silybum marianum (seed) (175 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is 21st Century Standardized Milk Thistle Extract, 60 Vegetarian Capsules safe to take?

21st Century Standardized Milk Thistle Extract, 60 Vegetarian Capsules 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 21st Century a trustworthy supplement brand?

21st Century receives a brand trust score of 76/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1991 and headquartered in Tempe, Arizona, United States, the company offers 231 products in their lineup. They hold 2 verified certifications including Consumerlab, Nsf Gmp. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: 21st Century has 4 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.