Mason Natural NAC, 500 mg, 60 Capsules supplement bottle
Mason Natural

NAC, 500 mg, 60 Capsules

What We Researched
1 active ingredient analyzed · 5 inactive ingredients decoded · 2 brand certifications checked · 4 retailers compared · Last updated: Mar 2026
75
Product Score Fair
66
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
N-Acetyl-L-Cysteine 500 mg **
Bioavailability Excellent

Absorption Rating

  • N-Acetyl-L-Cysteine Good
Other Ingredients Excellent

Fillers & Additives

  • Gelatin (Bovine)
  • Microcrystalline Cellulose
  • Vegetable Magnesium Stearate
  • Silicon Dioxide
  • Maltodextrin
Efficacy Very Poor

Dosage Analysis

  • N-Acetyl-L-Cysteine 500 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
N-Acetyl-L-Cysteine 500 mg **

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Gelatin (Bovine) Safe

It is used to make capsules.

Microcrystalline Cellulose Safe

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

Vegetable Magnesium Stearate Safe

Prevents ingredients from sticking to equipment. Derived from vegetable sources.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Maltodextrin Generally_safe

Helps carry and stabilize active ingredients. Provides bulk.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$12$11$10$9$8 Mar 12 $9.94$9.69
iHerb
Vitacost

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

Brand Trust Report
Mason Natural

Founded 1967 · Miami Lakes, Florida, USA · 161 products · masonvitamins.com

Certifications

2 certifications
Consumerlab Verified Source
Fda Gmp Inspections Verified Source

Transparency

2 claims
Third Party Testing Claim — Claimed Source

Violation History

4 incidents
Recall Herbal Colon Cleanser Capsules2025-09-02Source
Recall Healthy Sense Daily Multiple with Iron and People's Choice Women's Daily Vitamins with Iron2022-11-17Source
Prop 65 Lead2017-03-10Source
Prop 65 Lead2016-03-28Source
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Frequently Asked Questions
Is Mason Natural NAC, 500 mg a good supplement?

Mason Natural NAC, 500 mg, 60 Capsules received a product quality score of 75/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 1 active ingredients Of the 5 inactive ingredients, 4 are rated safe and 0 are flagged for review. The manufacturer, Mason Natural, holds a brand trust score of 66/100 with 2 verified certifications including Consumerlab, Fda Gmp Inspections.

What are the ingredients in Mason Natural NAC, 500 mg?

Mason Natural NAC, 500 mg contains 1 active ingredients: N-Acetyl-L-Cysteine (500 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Mason Natural NAC, 500 mg safe to take?

Mason Natural NAC, 500 mg, 60 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 Mason Natural a trustworthy supplement brand?

Mason Natural receives a brand trust score of 66/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1967 and headquartered in Miami Lakes, Florida, USA, the company offers 161 products in their lineup. They hold 2 verified certifications including Consumerlab, Fda Gmp Inspections. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Mason Natural 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.