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21st Century Red Yeast Rice 600 mg supplement bottle
21st Century

Red Yeast Rice 600 mg Review

What We Researched
3 active ingredients analyzed · 6 inactive ingredients decoded · 3 brand certifications checked · Page generated: Sep 2026
93
Product Score Excellent
85
Brand Score Good

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Total Carbohydrates 1 g <1%†
Red Yeast Rice Powder (Monascus purpureus) 1,200 mg **
Bioavailability Very Good

Absorption Rating

  • Total Carbohydrates Fair
  • Red Yeast Rice Powder (Monascus purpureus) Good
Other Ingredients Excellent

Fillers & Additives

  • Vegetable Cellulose
  • Maltodextrin
  • Magnesium Stearate
  • Oat Fiber
  • Rice Bran
  • Silicon Dioxide
Efficacy Excellent

Dosage Analysis

  • Red Yeast Rice Powder (Monascus purpureus) 1,200 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Total Carbohydrates 1 g <1%†
Total Sugars <1 g **
Red Yeast Rice Powder (Monascus purpureus) 1,200 mg **

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Vegetable Cellulose Safe

Forms a vegetarian capsule shell alternative to gelatin.

Maltodextrin Generally_safe

Helps carry and stabilize active ingredients. Provides bulk.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Oat Fiber Generally_safe

It is used as a filler or source of fiber.

Rice Bran Safe

Natural filler and source of fiber.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Brand Trust Report
21st Century

Founded 1991 · Tempe, Arizona, United States · 383 products · 21stcenturyvitamins.com/

Certifications

3 certifications
Nsf Gmp Source available Primary evidence
NSF Contents Certified Supporting evidence unavailable
NSF Certified Supporting evidence unavailable

Transparency

5 claims
Third Party Testing Claim — Claimed Evidence available Evidence
Testing Lab Disclosure — Verified Evidence available Evidence
In House Testing — Verified Evidence available Evidence
Contains Proprietary Blend — True Brand claim; evidence unavailable

Violation History

4 incidents
Prop 65 Lead2021-06-22 Source available Primary source
Recall Vitamin D3 5000 IU Tablets2021-05-19 Source available Primary source
Lawsuit False advertising of Glucosamine/Chondroitin supplements.2012 Source available Primary source
Prop 65 Lead2008-12-23 Source available Primary source
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Frequently Asked Questions
Is 21st Century Red Yeast Rice 600 mg a good supplement?

21st Century Red Yeast Rice 600 mg received a product quality score of 93/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 3 active ingredients with 75 servings per container. All 6 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, 21st Century, holds a brand trust score of 85/100.

What are the ingredients in 21st Century Red Yeast Rice 600 mg?

21st Century Red Yeast Rice 600 mg contains 3 active ingredients: Total Carbohydrates (1 g), Total Sugars (<1 g), Red Yeast Rice Powder (Monascus purpureus) (1,200 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is 21st Century Red Yeast Rice 600 mg safe to take?

GoodSupp reviewed the inactive-ingredient data available for 21st Century Red Yeast Rice 600 mg. All 6 inactive ingredients — including capsule materials, fillers, and binders — are currently classified as safe in GoodSupp's ingredient reference data. This label analysis cannot determine whether the product is safe for a particular person, and source labels may change. 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 85/100 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 383 products in their lineup. 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 — read our methodology. 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.